BMW will launch two new cars in the spring, extending the total number of models offered by the German firm in the UK to 18 body styles and no fewer than 231 versions.

The BMW 1 Series Convertible, priced at £24,055,will go on sale in April 2008 and will initially be offered with two engines.

The BMW 120i Convertible is powered by a Hams Hall-built 2.0-litre four-cylinder unit producing 170 horsepower.

Like all current 1 Series derivatives, the 1 Series Convertible uses EfficientDynamics technology to achieve impressive performance figures. The 120i goes from zero to 62mph in 8.4 seconds, but is also capable of returning 42.8mpg on the combined cycle and CO2 emissions of 158 g/km.

The BMW 125i Convertible is powered by a 2,996cc six-cylinder engine. The 218 horsepower powerplant propels the 125i Convertible from zero to 62mph in 6.8 seconds. As the current range flagship the 125i Convertible still offers affordable and green' motoring on account of the 34.9mpg combined fuel consumption figure and 195g/km CO2 emissions output.

Catering for a very different BMW customer, the new BMW M3 Saloon goes on sale in March.

Powered by an award-winning 3,999cc V8 engine, the M3 Saloon is the second variant of the current 3 Series body style to be launched. Its 420 horsepower engine powers the car from zero to 62mph in 4.9 seconds before going on to an electronically-limited top speed of 155mph. Fuel consumption on the combined cycle is 22.8mpg.