The company claims the saloon’s 173mph top speed makes it the world’s fastest diesel production car. The Touring tops out at 172mph.
Power comes from an Alpina-tuned version of BMW’s 3.0-litre six-cylinder diesel engine. It develops 345bhp and 700Nm of torque and powers both versions the D3 from 0-62mph in 4.6 seconds. Alpina also claims fuel economy of 53.2mpg and CO2 emissions of 139g/km for the saloon, and 52.3mpg and 142g/km of CO2 for the estate.
Alpina says the D3 took two years to develop by the company’s team of 50 engineers. The car’s engine, gearbox, cooling system, body structure, wheels, tyres, aerodynamics, suspension and interior have all been upgraded over the BMW 330d on which it’s based.
The engine features Alpina’s own ECU and, like the petrol-powered B3 Bi-Turbo, ditches BMW’s single turbo for a pair of smaller turbochargers to increase response times.
To cope with the engine’s torque, Alpina worked with ZF to tweak the eight-speed automatic gearbox, too. Around 20 per cent of the gearbox’s parts are changed when compared to the unit BMW uses.
The brakes are bespoke items from Brembo, and are covered by Alpina’s trademark multi-spoke 19-inch alloys. The DSC system and M Sport adaptive suspension has been recalibrated specifically to work with the wheel and tyre package Alpina fits. All cars also get a quad exhaust system developed by specialist supplier Akrapovic.
Alpina also adds branded floor mats and logos on the seat backs and door sills, plus a model plaque on the centre console showing the car’s unique build number.
Alpina is keen to play-up the D3’s company car credentials, as the car’s low CO2 helps contribute to a 22 per cent benefit in kind rate. The company says, “a 40 per cent tax payer would currently pay £344.66 per month - little more than half the tax payable for running a comparable petrol vehicle.”