BMW 1 Series Coupé

The new BMW 1 Series Coupé goes on sale in the UK in November and will be available in 120d, 123d and 135i guises. The 135i marks the first time a twin-turbo petrol engine has powered a 1 Series, while the launch of the 123d heralds the introduction of the world's most powerful production four-cylinder diesel engine.

The flagship of the range is the BMW 135i with its 3.0-litre twin-turbocharged petrol powerplant. Offering 306hp from its light alloy and magnesium straight-six engine, the 135i is capable of accelerating from zero to 62mph in 5.3 seconds before going on to an electronically-limited top speed of 155mph. Peak torque of 400Nm from just 1,300rpm through to 5,000rpm ensures smooth yet rapid progress and in-gear flexibility.

The BMW 135i is joined in the range by another twin-turbocharged model to offer a unique blend of performance and economical motoring. The 204hp four-cylinder engine in the BMW 123d Coupé sets a benchmark for small diesels. Its 1,995cc powerplant is the world's first all aluminium diesel to have an output per litre figure in excess of 100hp - something only BMW M cars usually attain. It is also the first four-cylinder production diesel to come with twin-turbo technology.

The BMW 120d Coupé will be available in ES, SE and M Sport guises, while the 123d Coupé will be offered in SE and M Sport and the 135i Coupé just as an M Sport. M Sport raises the specification bar by including 17-inch light alloy wheels on the 120d and 123d Coupé but unique 18-inch light alloy wheels on the 135i Coupé, M Aerodynamic package, M Sports suspension, Sports seats, High-gloss Shadowline exterior trim, M leather steering wheel, M designation door sills and Anthracite headlining.

Prices for all three models will be announced closer to the on sale date.