The drop-top gets the same meat-eating 4.4-liter twin-turbo V8 as the M5 and the M6, which hits 560 hp from 5,750 rpm to 7,000 rpm, while peak torque lays across a long, ludicrously flat 500-lb-ft ...

The car's 5.0-liter V10 has been upped by 494 hp and 280 lb-ft of torque to give the M6 a Veyron-equaling 1,001 hp and 665 lb-ft of torque.

The turbocharged V-8 in its place is no slouch. Found in BMW's other M vehicles, the 4.4-liter twin-turbocharged V-8 makes an even more impressive 555 horsepower and 500 pound-feet of torque under ...

The 4.4-litre engine develops a peak output between 5,750 and 7,000 rpm, while its maximum torque is there between 1,500 and 5,750 rpm. Redline: 7,200 rpm and it's limited electronically form ...

There are BMW M6 drivers out there for whom the stock output of 560-hp and 500 lb-ft of torque just isn't enough. At least that's what German tuner Manhart is betting on after announcing its MH6 ...

According to PP-Performance, despite its rear-wheel drive, the tuned M6 should be able to reach 100 km/h (62 mph) in 3.7 seconds. All that extra performance doesn’t come cheap though.

Even more extreme than the 950 HP, is the torque (unknown). When stock, the E63 AMG S packs 585 PS and no fewer than 800 Nm of torque. That’s 590 lb-ft!

Try this one on for size: BMW already dropped the full details on both the new M6 coupe and convertible, but only the hardtop makes its debut here at the 2012 Geneva Motor Show. We'll have to wait ...