http://www.businesstimes.com.sg/sub/...17911,00.html?
Published February 7, 2009
Superfast shifts
PARALLEL importer Vincar Pte Ltd has been offering the BMW 335i Coupe with the seven-speed sports automatic transmission since last month and it says those who have bought it so far appreciate the performance edge it has over the 335i Coupe with a conventional automatic transmission.
Unlike the six-speed Steptronic gearbox with a torque converter, the double clutch transmission (DCT) has faster and crisper gear changes. The reason is that as one gear is being disengaged, the next gear is already in position, thus minimising loss of torque with the uninterrupted transmission of power.
Along with an electronic gear lever on the centre console, the 335i with DCT also has gearshift paddles on the steering wheel for manual changes. Press or pull one of them and the DCT shifts more rapidly.
The six-speed auto box was no slacker, but the DCT makes it seem almost lazy. As a result, the 335i Coupe feels more responsive. The new transmission also makes going flat out smoother and easier. If there is any doubt, the 335i Coupe with DCT does the zero to 100 kmh sprint in 5.4 seconds, or 0.3 seconds faster than with the conventional six-speed auto.
The 335i Cabriolet, which VinCar also offers for an extra $19,000, accomplishes it in 5.7 seconds.
The principle of the double-clutch transmission has its roots in motor racing, where shifting up at full throttle without interruption of traction saves a few fractions of a second. BMW says DCT was designed for engine speeds of up to 9,000 rpm and torque levels of up to 600 Nm. It is therefore suited to the 335i coupe/convertible's high-revving inline six-cylinder engine.
But because the gear changes are also jerk-free, DCT offers the same comfort as a car with a conventional automatic transmission.
SPECS
BMW 335i Coupe with DCT
Engine 2,979cc inline-6 turbocharged
Transmission 7-speed double clutch
Max power 306 hp @ 5,800 rpm
Max torque 400 Nm @ 1,300 rpm
0-100 kmh 5.4 secs
Top speed 250 kmh (governed)
Price $210.988 (with COE)
Contact Vincar Pte Ltd
Tel: 6473-1119