Twin-turbo limo made for rich folk in a hurry

It's no secret the Alpina B7 is seriously fast, but this latest video shows just how fast the twin-turbo luxury yacht on wheels really is.

Based on the BMW 7 Series, the Alpina B7 features a 4.4-litre twin-turbo V8 pumping out 447kW of power and 800Nm of torque, sent to the rear wheels via an eight-speed automatic transmission.

Alpina claims a 0-100km/h time of 3.7 seconds for the all-wheel drive model offered in Europe (the rear-wheel drive Aussie version claims 4.2 seconds), which is right up there with some of the fastest sports cars and supercars in the world. Not bad for a two-tonne limousine.

Top speed, meanwhile, is rated at a manic 330km/h regardless of whether your B7 drives the rear or all four wheels.

In the above video, an Alpina Green-finished B7 takes on several well-known Bahnstormers, including an Audi RS3, a Mercedes-AMG C63 S sedan, even an Audi RS6.

How does it fare? We won't ruin it for you – check out the video above.