BMW unveiled the 3-Series Convertible in Spring of 2007. The model comes with a three-piece electronically-operated retractable hard-top – a first for BMW.Stowed or raised in approximately 22 seconds, the new roof has been introduced, not only for added security, but also for better visibility and a greater feeling of space and light for occupants. Because the roof features a larger rear glass windscreen and side windows, visibility has improved by 38 per cent compared to the outgoing 3 Series Convertible.
The new High-Precision Direct Injection system on the BMW 3 Series Convertible uses centrally-mounted piezo crystal injectors spraying atomised fuel vapour directly into the combustion chamber. Combined with Bi-VANOS variable valve technology the system delivers the most efficient burn of fuel for maximum power and parsimonious economy. The fruits of this technology are highlighted by the impressive performance figures posted by all of the petrol-powered 3 Series Convertibles.
BMW 3-Series Convertible
The 325i Convertible with its all-new 218hp six-cylinder engine develops 270Nm of torque. The open-topped 325i covers the 62mph sprint in 7.6 seconds and can attain a top speed of 152mph. However, it is still capable of a combined consumption figure of 35.8mpg.
Representing the flagship of the range is the 335i Convertible with its twin-turbocharged 3.0-litre engine. Using an aluminium cylinder block rather than the magnesium alloy unit from the 325i Convertible, but with the added benefit of lag-free forced induction, the 335i posts a zero to 62mph time of 5.8 seconds. The 306hp engine, higher than the output of the E36 BMW M3, has been restricted to a 155mph top speed. Fuel consumption on the combined cycle is 28.5mpg. Peak torque of 400Nm from just 1,300rpm through to 5,000rpm gives the driver a real surge of effortless power, acceleration and flexibility.
Audi A4 Convertible
The A4 Convertible was unveiled at 2006 New York Auto Show. It features an enjoyable and sporty driving experience, superior and complex technology, classic yet exciting styling and a level of luxury that even satisfies the demands made in the luxury class.
The new Audi A4 Convertible is being launched with a choice of four engine versions, all of which are longitudinally installed. The two highly modern petrol engines with FSI petrol direct injection for the new A4 Convertible: the 188 kW (255 bhp) 3.2 V6 and the turbocharged two-litre four-cylinder 2.0 TFSI, which delivers 147 kW (200 bhp). These combine high performance with a spontaneous response to every movement of the accelerator pedal and a peak-torque range at a high level. The 1.8 T which develops 120 kW (163 bhp) is also available.
Audi A4 Convertible
Diesel enthusiasts can order the immensely powerful 3.0 TDI with common rail injection and piezo injectors. Other engines will be added at a later date.
This modern TDI engine, which made its debut a few months ago in the large A8 and A6 saloons, develops an output of 171 kW (233 bhp) in the A4 Convertible. This potent V6 makes a torque of 450 Nm available between 1,400 and 3,150 rpm.