Audi unveiled today at the Geneva Motor Show an electric version of their newly launched A1. The e-tron concept is equipped with an electric drive system similar to the one on Chevrolet Volt. The e-tron has an autonomy of 50 kilometers when used only in electric mode.

The internal combustion engine that charges the batteries can deliver a total of 102 hp in short bursts when the sprint from 0 to 60 mph is made in just 10 seconds. Top speed is more than 80 mph. Continuous output is rated at 61 hp and 150 Nm of torque. The electric motor sends its power to the front wheels via a single-speed transmission that can be switched between "Drive," "Reverse," and "Neutral".

The A1 e-tron concept car has a Wankel engine as a range extender. It has a chamber volume of 254 cc and runs at a constant 5,000 rpm and can be switch on and off as necessary with the push of a button. It produces produces 15 kW of electric power and weighs only around 154.32 lb. It can extend the concept’s range to 130 miles.

UPDATE 07/21/11: The Audi A1 e-Tron was a surprise participant at the Silvretta E-Auto Rally. Together with the other Audi electric car in attendance, the Q5 HFC, which managed to place sixth in the entire proceedings, the A1 E-Tron made a good showing of itself a year after another one of its big brothers, the R8 E-Tron, went and wowed the entire event. Check out the video Audi posted to see how the A1 E-Tron performed.

UPDATE 06/05/2012: We’ve just learned from our friends over at CAR that the A1 e-tron is being axed due to extravagantly high production costs. This car was planned to be similar to the Chevy Volt, as it was going to have a gasoline engine to extend the range of its electric motor by charging the batteries via a Wankel (rotary) engine.

Press release after the jump.

Press release

The new e-tron model series from Audi will gain another new member at the Geneva Motor Show: The Audi A1 e-tron is a Mega City Vehicle (MCV) with an innovative drive technology. It comes equipped with a powerful electric motor for zero-emission driving in the city. There is also an internal combustion engine on board that recharges the battery in exceptional circumstances. The A1 e-tron is very agile thanks to the 75 kW (102 hp) peak power of its electric motor.

The technology of the Audi A1 e-tron

2010 Audi A1 e-tron Concept High Resolution Exterior
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The e-tron model family from Audi is just a few months old, but it already has a number of members, for each of which Audi has chosen a different drive technology. The first e-tron, which debuted at the 2009 IAA in Frankfurt/Main, is a near-series high-performance sports car with electric motors for all four wheels. The study shown at the Detroit Motor Show in 2010 is a lightweight, compact two-seater with two electric motors on the rear axle.

The A1 e-tron now presents another approach – a compact electric car in the premium class. The four-passenger, two-door MCV city car was designed specifically for use in the metropolitan areas of Europe and North America and in the rapidly growing megacities of Asia and South America. The Audi A1 e-tron always drives on electric power; its internal combustion engine is only used to recharge the battery in isolated cases.

The integration of the new technologies shows the holistic approach that Audi is pursuing with electric mobility. The objective is to use the energy with the lowest possible losses. The precise interaction of the components, their intelligent packaging, and the efficient management of the current flows are the product of the expertise that the company has developed in this area.

Audi has developed a proprietary thermal management system to keep the battery, the electric motor, and the power electronics within their respective ideal temperature windows.

Behind the three e-tron models is a broadly diverse and modular technology platform that continues to grow very rapidly as Audi drives development forward.

The electric motor: 75 kW (102 hp) peak power

2010 Audi A1 e-tron Concept Drivetrain
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The synchronous electric motor of the Audi A1 e-tron is mounted transversely at the front of the car. Its low mounting position has a positive effect on the vehicle’s center of gravity. Continuous output is rated at 45 kW (61 hp), with peak power of 75 kW (102 hp) available in short bursts. 150 Nm (110.63 lb-ft) of torque is continuously available, and peak torque is 240 Nm (177.01 lb-ft).

The electric motor sends its power to the front wheels via a single-speed transmission. The elegant, retractable selector lever on the console of the center tunnel used to choose between “Drive,” “Reverse,” and “Neutral” was taken from the first Audi e-tron.

The power electronics are mounted in the engine compartment above the electric motor. The most important components are the pulse-controlled inverter, which serves as the controller between the electric motor and the battery; the DC converter, which connects the high-voltage network with the 14 volt electrical system; a breaker unit to protect the high-voltage components; and the charging module. The socket for the standard charging plug is located behind the rings in the single-frame grille of the Audi A1 e-tron. A fully depleted battery can be recharged in approximately three hours from the 380 volt grid. A display immediately adjacent to the plug-in connection shows the current charge status and the charging time remaining.

The concept of the innovative Mega City Vehicle requires the electrification of key auxiliaries. The refrigerant compressor of the climate control system, for example, is electrically powered by a high-voltage electric motor that supplies only the amount of power needed at the time.

This increases system efficiency substantially compared to conventional concepts. Thanks to a special circuit, the climate control loop also functions as a heat pump that regulates the temperature of the cabin and the battery.

The power steering of the Audi A1 e-tron is electro-mechanical and thus particularly energy-efficient. An electronic brake system makes it possible to tap into the recuperation potential of the electric motors. A hydraulic fixed-caliper brake is mounted on the front axle, with two novel electrically-actuated floating-caliper brakes mounted on the rear axle. These floating calipers are actuated not by any mechanical or hydraulic transfer elements, but rather by wire (“brake by wire”). In addition, this eliminates frictional losses due to residual slip when the brakes are not being applied. In addition, the servo unit received a new, demand-controlled electric vacuum pump.

The large electric motor powering the A1 e-tron can convert braking energy into electric current and feed it back into the electrical system. The high degree of recuperation benefits overall efficiency. The electric control actions are imperceptible to the driver, who notices only the familiar, precise, and perfectly controllable pedal feel.

The battery pack: a compact T arranged below the floor

2010 Audi A1 e-tron Concept Drivetrain
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The energy storage unit is arranged below the floor, where it is ideal for the center of gravity and weight distribution. The battery pack is shaped like a T, with the short “transverse beam” filling the rear section of the center tunnel and the “cross-beam” filling that area in front of the rear axle where the fuel tank is otherwise located. The 380 volt lithium-ion rechargeable battery has a nominal energy content of 12 kilowatt hours. It comprises 96 prismatic cells and weighs less than 150 kilograms (330.69 lb).

The Audi A1 e-tron can drive 50 kilometers (31.07 miles) emission-free in city traffic on the powerful battery. On longer trips, the battery is recharged by a particularly compact internal combustion engine mounted below the luggage compartment.

The range extender

2010 Audi A1 e-tron Concept High Resolution Drivetrain
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The A1 e-tron concept car has a Wankel engine as a range extender, but other compact concepts are also possible. The small single-rotor Wankel has a chamber volume of 254 cc and runs at a constant 5,000 rpm in its peak efficiency window. The electronics also consider navigation data such as the destination and route profile to automatically activate the range extender as needed. The driver can also turn the range extender on and off as necessary with the push of a button The fuel tank holds 12 liters (3.17 US gallons).

The great strengths of the Wankel engine are the nearly vibration-free and quiet operation, the small dimensions, and the extremely low weight. Together with the generator, which is powered by the Wankel engine and produces 15 kW of electric power, the complete assembly weighs only around 70 kilograms (154.32 lb). This weight also includes the special power electronics, the intake, exhaust, and cooling unit, plus the insulation and the subframe.

Driving experience

2010 Audi A1 e-tron Concept High Resolution Exterior
- image 350895

The first defining impression that the driver of the Audi A1 e-tron gets is that of nearly total silence. Even the Wankel engine in the back can barely be heard when it is running.

The second characteristic perception is the power of the electric motor, nearly all of which is available instantly and thrusts the Audi A1 e-tron forward with authority. The innovative Mega City Vehicle, which despite its complex drive technology weighs only 1,190 kilograms (2,623.50 lb) delivers zero-emission driving fun in a modern and sophisticated manner. The vehicle accelerates from 0 to 100 km/h (62.14 mph) in 10.2 seconds and has a top speed of more than 130 km/h (80.78 mph).

The Audi A1 e-tron can also cover longer distances if the range extender charges the battery. The extra range, which is intended primarily for interurban driving, is 200 kilometers (124.27 miles).

According to the draft standard, the two different operating modes yield a fuel consumption of only 1.9 l/100 km (123.80 US mpg), which corresponds to CO2 emissions of 45 g/km (72.42 g/mile). In electric mode, there are zero local CO2 emissions - the compact A1 e-tron is thus ecological and economical.

The third impression that the A1 e-tron makes is that of a larger car. The compact two-door boasts all of the strengths of the new A1 model series – the carefully tuned, sporty chassis with specially designed 18 inch alloy wheels and 215/35 R18 tires; the generous, “grown-up” interior; the excellent fit and finish; and a multitude of high-end equipment.

The dark shade “ebony” dominates the interior. The seats – with stone gray seams – and the headliner are in “Alabaster White".


2010 Audi A1 e-tron Concept High Resolution Exterior
- image 350898

The concept car in Geneva has a special “Aqua Mint, pearl effect” paint finish; the contrasting roof arch is offset in “High Gloss Steel dark.” As with the other two e-tron models, the 18-inch wheels with a 20-spoke turbine design convey the high-tech aspiration of the concept.

The rear diffuser with aluminum trim lacks tailpipes. This emphasizes the width of the vehicle and suggests the low emissions. The two front fenders are emblazoned with the “e-tron” logo.

The “Aqua Mint, pearl effect” exterior color carries over into the interior, where it adorns the door panels and the center console. The shift lever is a special leather-wrapped design; as is typical for the e-tron models, the start-stop button was placed in the front of the center console. A specially designed battery cover at the front of the car and the range extender engine with its cooling fins displayed under a sheet of glass in the luggage compartment also serve to visually underscore the clean technology of the A1 e-tron. And because an innovative drive concept also calls for innovative information management, the concept car features a freely programmable instrument cluster with a virtual display surface and innovative display and operating concept.

The equipment and data specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.

What do you think?
Show Comments


  (320) posted on 01.5.2012

It really has a simple and ordinary look indeed but it will still caught anyone’s attention for having a decency image and for being a tidy car. I also find it so refreshing and they were right that the wheels is not really impressive but it really suits for it.

  (397) posted on 01.2.2012

The wheels suits to the front design and the front light on this e-tron and also I love the fact that this is an electric motor.

  (692) posted on 01.1.2012

Just what I thought, a1 will receive the E-tron technology, with the success of Audi e-tron on Geneva, they are planning to apply the E-Tron technology to A8 also.

  (777) posted on 12.21.2011

The new technology installed in the car is quite impressive. I guess this would be the start of a more reliable version of electric cars.

  (570) posted on 12.11.2011

I love the angst of this e-tron and even on its decency. However, I noticed that its wheels seem not suited for the looks of it. Moreover, I’m so impressed with its dressed-up interior, especially on its center console.

  (728) posted on 11.30.2011

I just only love the comfortable and cozy interior of this Audi A1, but I don’t like the fact that it is an electric vehicle, so unreliable! Well, I hope that it would also be available in a diesel motor.

  (647) posted on 10.4.2011

Hatchback already marks to the interest of the people. And If I would buy new, my choice would be a convertible sports car, or a hatchback prototype of a car. That two already pleasures to me.

  (474) posted on 09.12.2011

I don’t like the wheels of this A1 e-tron. The decency that it have is quite impressive even the technologies that it have and the interior of it is seems so cozy and relaxing.

  (377) posted on 09.7.2011

The style that this etron had is so simple and the platform of it seems so very common, but still this kind of car is so reliable and practical to use just like on what they say. Oh! and they are right that the front headlights is so cool and impressive.

  (428) posted on 09.5.2011

Business people would surely love this decent car, and I must say that the front headlight of this A1 e-tron is really quite impressive and I simply love it. smiley

  (365) posted on 08.31.2011

Really had a simple and ordinary look indeed but it will still caught anyone’s attention for having a decency image and for being a tidy car. I also find it so refreshing and GoldenBullet were right that the wheels is not really impressive but it really suits for it.

  (459) posted on 08.24.2011

I don’t like the wheels of this car but I must say that it suits on A1 e-tron. I love the aggressive front headlights of it and the clever look of it, as for the platform I found it so simple and ordinary.

  (134) posted on 08.11.2011

The exterior design looks so simple but at the same time it is quite impressive for an electric car.

  (317) posted on 08.8.2011

I love the fact that it is reliable for an electric car. The driving experience that the article said is really impressive at all.

  (287) posted on 08.2.2011

The wheels suits to the front design and the front light on this e-tron and also I love the fact that this is an electric motor.

  (372) posted on 07.28.2011

This is one is a reliable electric car. One good thing here is that they provide a complete information of the interior and the exterior design. It does not look like an electric car concept because of the sportiness it shows.

  (384) posted on 07.26.2011

It seems that there are a lot of concept car that was line up for the future production of the Audi. The new technology installed in the car is quite impressive. I guess this would be the start of a more reliable version of electric cars.

  (579) posted on 07.26.2011

Wow! I really love the sportiness of this vehicle. And it seems that the Audi has built a high technology for its electric motor. Well, with the new system, I bet the reliability of the car is not that questionable at all.

  (592) posted on 07.25.2011

As far as I remember, the Audi already joined that show, but it was years ago but unable to become famous. I agree that it has the power performance for an electric car. They must have a reserve battery if ever it loses the electric energy.

  (429) posted on 07.22.2011

I can say that it has the impressive output compare to other electric cars. The good thing here is the Audi A1 actually join the Silvretta E-Rally Race. Well, it’s a good start for them.

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