The BMW 4 Series Convertible has been spotted testing with its roof down for the first time. The 4 Series name will be used on coupe and covertible versions of the 3 Series, and is due to go on sale in 2013.
The 4 Series Convertible gets the same nose, wheel designs and interior trim as the new 3 Series, but the soft-top model's wheelbase is 50mm longer than the car it replaces, for more space in the back seats. There should be more luggage space too, even with the top down.
It's also likely to weigh around 40kg less than the outgoing 3 Series Convertible, and it's expected that the roof will be able to open and close much faster than the current car’s time of 23 seconds.
Economy will also be improved, thanks to the addition of an EfficientDynamics model with regenerative braking, gear-shift indicator and a stop-start system.
The model line-up is likely tol follow the 3 Series saloon, with a 420d using the 161bhp 2.0-litre diesel engine with fuel economy of around 65mpg. Petrol choices will include a 2.0-litre turbocharged four-cylinder petrol in the 428i, and a 315bhp 3.0-litre turbocharged six-cylinder in the 435i.
The flagship M4 convertible is set to joing the line-up in 2014, with a turbocharged six-cylinder producing around 450bhp. Expect a 0-62mph time of around 4.7 seconds.