BMW 1 Series Coupe Official Info BMW is extending the 1 Series line-up in the UK with a new model consisting of a brace of high performance twin-turbocharged engines and a diesel capable of a frugal 58.9mpg. The new BMW 1 Series Coupe 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. BMW 1 Series Coupe Official Info bmwcoupeseries in Public bookmarkswith 1autoautomotivebmwcarscoupeseries