From the folks that gave us the SR3 SL comes another race car set to get your hearts pumping on the track. The new SR1 by Radical Motorsports is an entry level sports-prototype racing car aimed at the track-day driver and club racer. It is priced at a measly £29,850, or $37,800 at the current exchange rates.

The new SR1 was designed by the same guys responsible for the Radical’s SR9 LMP2 racecar, so it follows in the same design direction, but tweaked for current track regulations. It has been designed to be ideal for both the driver and the passenger.

Under the hood, the racing prototype gets an RPE-Suzuki four-cylinder engine that delivers a total of 210 HP and is mated to a six-speed sequential gearbox as standard. The SR1 can go up to a top speed of 138 mph and sprints from 0 to 60 mph in just 3.6 seconds.

UPDATE 08/23/2012: The Radical SR1 has begun testing at Bedford Autodrome, one of the locations for next year’s Radical SR1 Cup championship for novice drivers and trackday enthusiasts. Radical has marked this time in their history with a new video introducing all drivers to their new Radical SR1. Check it out by clicking on the image above.

Hit the jump to read more about the new Radical SR1.

  • 2013 Radical SR1
  • Year:
  • Make:
  • Model:
  • Engine:
  • Transmission:
    six-speed sequential
  • Horsepower @ RPM:
  • Torque @ RPM:
    130 @ 10500
  • 0-60 time:
    3.6 sec.
  • Top Speed:
    138 mph
  • car segment:
  • body style:

Exterior and Interior

2013 Radical SR1 Exterior
- image 462083

The new Radical SR1 was built on a carbon steel space-frame chassis with an integral safety cell - complying with MSA safety requirements - and an aluminum front crash structure. The car’s body is comprised of four-piece lightweight fiber-glass so it weighs just 1146 lbs.

The SR1 is equipped with rear view mirrors, composite side pods with radiator inlet and internal ducting, composite side-skirts, a removable composite tail section with integral induction intake and ventilation grilles, a rear wing with end plates, and rear brake and fog lights. It sits on 13" Radical cast aluminum wheels combined with 240mm× 25mm, 30-vane ventilated discs front and rear.

2013 Radical SR1 Interior
- image 462088

The interior of the SR1 received seats made of molded composite, a carbon fiber dashboard, and a display unit that offers details on the engine parameters/speed and warning lights. To fill safety requirements for the track, Radical is offering a comprehensive safety cell and deformable crash structure tested to FIA standards, racing-specification harnesses, and an integral fire extinguisher system.

A nice little added touch to the finesse of the vehicle is the owner’s name placed on the side of the cockpit. Nothing says "mine" like a little tattooing.

Additional Standard Features for the SR1

2013 Radical SR1 Exterior
- image 462080
  • Two-seater powder-coated carbon steel spaceframe chassis with integral safety cell - complying with MSA safety requirements
  • Aluminium front crash structures
  • 44 liter foam-filled aluminum fuel tank mounted behind the driver within the safety cell.
  • Fully adjustable pedal box.
  • Driver seat-belt complying wth FiA requirements.
  • Four Butterfly, 41mm fuel injection system with composite ram air box
  • Lightweight steel flywheel with multi-plate clutch
  • Stainless steel manifold and silencer
  • Chain drive system, torque-biasing limited-slip differential for seamless diff lock-up
  • Fully adjustable Nik suspension system front and rear - unequal length top and bottom wishbones, fabricated uprights, forged steel centre lock hubs and interchangeable anti-roll links
  • Single-adjustable, coil-over dampers
  • Radical four-pot calipers front and rear
  • 240mm dia. × 25mm, 30-vane ventilated discs front and rear
  • Radical cast aluminum wheels - 7" × 13" dia. front and 9" × 13" dia. rears.
  • Dunlop bespoke slick tires.
  • Four-piece lightweight fiber-glass bodywork with self-colored gel coat finish
  • Composite front diffuser with removable, high-nose, low-drag front section
  • Wheel arch and side pod louvres
  • Rear view mirrors
  • Composite side pods with radiator inlet and internal ducting
  • Composite side-skirts
  • Removable composite tail section with intergral induction intake and -*Rear wing with end plates
  • Rear brake and fog lights
  • Molded composite, high-sided, drivers and passenger seats with adjustable mounts
  • Carbon-composite dashboard surround
  • Radical display unit incorparating an LED analogue rev counter, gear indicator, shift light, four LCD displays of engine parameters/speed and warning lights
  • Dash-mounted brake bias adjuster


2013 Radical SR1 Drivetrain
- image 462095

Just like any other Radical prototype, the new SR1 is powered by a Suzuki 1340cc 4-cylinder double overhead cam engine with a dry-sump oil system. The engine delivers a total of 210 HP and 130 lbs-ft at 10,500rpm and comes with a standard six-speed sequential gearbox. This power is enough to sprint the car from 0 to 60 mph in just 3.6 seconds and up to a top speed of 138 mph.

SR1 Overview

  • Length: 3.85m
  • Height: 1.04m
  • Width: 1.62m
  • Min Weight: 520 kg
  • Max Speed: 138mph
  • 0-60mph: 3.6 sec
  • 50-100mph:6.1 sec
  • Braking G’s: 1.8
  • Cornering G’s: 2.3


On the British market, the new SR1 is priced at £29,850, or $37,800 at the current exchange rates.


2013 Radical SR1 Exterior
- image 462085

If you’re looking for a track alternative to the new Radical SR1, you’ll find it in the Caterham SP/300.R, a more powerful and fastest alternative. It is powered by a 2.0-liter Ford Duratec Supercharged engine that delivers 301 HP and can go up to a top speed of 180 mph. Still, the extra power comes with a huge price: $135,000.

The choice really comes down to what you will be using the car for. If taking your racing prototype to a competition is in the cards, then a more powerful model may be better. If you just want to have fun, then the Radical SR1 will get the job done.

2013 Radical SR1 Exterior
- image 462086
  • Leave it
    • Could have delivered more power
    • Top speed is not suitable for a racing prototype
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  (579) posted on 08.30.2012

I like this sportscar, having those colors that give definite colorful stance.

  (613) posted on 08.30.2012

I can’t believe that a race car will cost this cheap. It’s good that this will be more affordable.

  (528) posted on 08.29.2012

Oh Men this is what I’m talking about. This has a cheap price which we sometimes looking at a race car.

  (776) posted on 08.28.2012

This is so UK. The prototype admires me more on this Radical.

  (291) posted on 08.28.2012

Oh my God! 6 shift-gearbox?! Are you kidding me?! A good and well-experienced driver should make a in-depth test to that car.

  (449) posted on 08.28.2012

With its current price of $37,800, it is very cheap knowing its a race car. smiley

  (692) posted on 08.28.2012

With the ability to generate 210 horsepower and 6 speed sequential gearbox, it’s no surprise if Radical SR1 will get a bunch of championship trophies from tournaments.

  (577) posted on 08.27.2012

It has a good sprinting time of 3.6 seconds though its top speed is only 138 MPH. Well, it’s still good for me.

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