There's been plenty of talk recently about possible plans for an M-tuned diesel 5-series but, as usual, Alpina seems to be half a step ahead of the company whose cars it bases its own products on: meet Buchloe's own super-fast diesel, the Alpina D5 Biturbo.
The headline stats are that Alpina has squeezed 345bhp from the BMW 3.0-litre twin-turbo diesel. This equates to a top speed of 168mph and 0-62mph in 5.2secs.
Perhaps more impressive, however, is the fact that Alpina has managed to do so while maintain the same fuel economy rating (45.6mpg) as the 241bhp 530d.
The power drives the rear-wheels via an Alpina-tuned eight-speed ZF auto and, as you'd expect, the tuner/manufacturer also chucks in its own bespoke springs, along with the ususal multi-spoke 20-inch alloys.
Oddly, Alpina doesn't give a torque figure for the new car. Perhaps that's because it feels that torque is cheap...