If the BMW M5 is not enough for you, Alpina created the new B5 Biturbo. Where the factory M5 packs 560 horsepower, the B5 has 600. But even more impressive is the B5 Biturbo bests the M5's 500 pound-feet of torque with 590 of its own. That beats the 15-hp boost from the M5's Competition Package and matches the power of the limited 30 Yahre edition - but with more torque.
All that muscle and twist is produced by Alpina's own version of BMW's 4.4-liter twin-turbo V8, mated to an eight-speed automatic transmission instead of a seven-speed dual-clutch gearbox. The result is a 0-62 time quoted at 4.2 seconds, besting the M5 by a tenth. The top speed is also unlocked from 155 miles per hour to 204 – which may be entirely hypothetical for most of us, but could make all the difference for those who regularly commute along the Autobahn.
Of course Alpina didn't tinker with the engine and leave it at that. It also customized the suspension, rolling stock, aero kit, and interior, and fitted a mechanical limited-slip differential built by Drexler Motor Sport. But perhaps the best part of all is that the Alpina B5 is also available as a wagon. That makes this modified Bimmer one of the best have-your-cake/eat-it-too propositions we could ever ask for.