Having met a couple I would said the M3 is quicker than an M5, at least in terms of 0-60.
The bigger car just seems to take longer to get rolling. Of course, I admit it might come down to skill, I didn't use launch control and I am not a pro drag car driver. Stretch it out to a 1/4 mile and the fight becomes more fair.
I'd say it was down to the driver:
E90/E92 M3 performance
* 0-60 mph (97 km/h): 4.4-4.2 seconds for the 2009 E90/E92 M3,[27] 5.1 sec for the convertible
* 1/4 mile: 12.7 seconds @ 183 km/h (113.7 mph) [27], Convertible: 13.1 @ 109 mph (175.4 km/h)
* Top Speed: Electronically limited to 249 km/h (155 mph), delimited ~290 km/h (180 mph)+
* Skid Pad: 0.98 g
* Slalom: 114.9 km/h (71.4 mph)
Performance
The E60 M5 took the title of the most powerful midsize sport sedan when released in 2005 with the 5l naturally aspirated V10 BMW S85 engine
* 0-100 km/h (62 mph): 4.2s [2]
o (0-100 mph: 10.1s, Road & Track [2/06])
o (0-60 mph: 3.8s, Road & Track [2/06])
* Top speed: 250 km/h (155 mph) actual (or 163 mph (262 km/h) indicated) with electronic speed limiter; 209 mph (336 km/h) actual with limiter removed [3]
* Power: 373 kW (507 PS; 500 bhp) at 7750 rpm [3]
* Torque: 520 N·m (384 ft·lbf) at 6100 rpm
At worst the M5 is about the same whent he E90 is at best. The M5 is faster with a better driver but from a rolling start I'd imagine the M5 to be quite a chunk faster since it's 100BHp more and the weight is about 150-200kg tops.
The M5 would be a cool car to drive on the motorways I feel that it's just too big for me, but I'd like a 500BHp car coupe that was E46 sized or a tiny but smaller
Koing