Luxury automaker Alpina has launched what it claims is the world's fastest production diesel. It's based on BMW’s 3 Series, boasts 257kW/700Nm and rockets from 0-100km/h in 4.6 seconds. Watch the BMW Alpina D3 Bi-Turbo in action!NOTTINGHAM, England – A new generation of high-performance diesel sedans and estates has been launched by specialist automaker Alpina, one of the world’s most highly-regarded manufacturers of luxury vehicles.The new six-cylinder D3 Bi-Turbo is capable of 257kW/700Nm and rockets from 0-100km/h in 4.6 seconds to a top speed of 278km/h. Mated to an eight-speed auto, fuel consumption is rated at 5.3-litres/100km with CO2 emissions of 139g/km.Image Gallery: BMW Alpina D3 Bi-TurboVideo: BMW Alpina D3 Bi-Turbo in action‘POWERING THROUGH THE MOUNTAINS'Alpina sales manager Matthew Stripling said: "What makes these figures even more remarkable is that this is also a luxury car that delivers its world-beating performance alongside uncompromising comfort and refinement. “The new six-cylinder D3 has a bespoke feel that touches all the senses to make every journey a pleasure, commuting or powering through the mountains.” The D3 Bi-Turbo is the result of a two-year development programme, based on BMW’s latest generation 3 Series, Using design and validation processes identical to those implemented by BMW, Alpina's team of 50 engineers worked with specialists to enhance the engine, transmission, cooling system, body structure, wheels, tyres, aerodynamics, suspension and interior.The BMW Alpina D3 Bi-Turbo is available in the UK as a sedan for the equivalent of R742 000 or as a Touring (estate) for R790 000. Standard kit includes M Sport suspension, leather upholstery, power-adjustable and heatable sports seats, aircon and bi-xenon headlights.The interior has luxury carpets, Alpina logos on the seats and door sills and blue instrument lighting. Each car has a plaque on the centre console showing the vehicle’s build number.Alpina has worked closely with BMW since 1961 and was registered as an vehicle manufacturer to ISO standards in 1983.