Yeah, but the V10 does not have more torque (m)
than the S62 and I suspect that the V8 in the upcoming M3 won't either. The V10 produces torque all the way up to 7,900 rpm, but virtually the same max figure as the s62. My seat of the pants experience was that torque felt the same. I also felt that the Z8 was faster than the e60 M5. Maybe it's the air in my hair syndrome, but...
Oh yeah I agree with you.
Given the displacement of the V10, it should not be a suprise. My Z8 with the Quaife LSD with even more torque is quicker to 60 than the E60 M5, in triple digits the E60 just pulls away.
The Air in My Hair Factor is the BIG argument for an M6 Cabriolet acquisition.
Re: Oh yeah I agree with you.
A few things to keep in mind:
Best Z8 0-60 time I've seen was 4.2 seconds running an open differential and RE-040 runflats (275 rears). E-60 M5 was clocked at 4.1 seconds by Road and Track magazine using the European-only F1 style launch control mode where the car's computer manages wheelspin and running a LSD plus Continental SportContact 2 tires (285 rears).
0-100 for Z8 was 10.2 seconds. M5 was 9.5 seconds.
1/4 mile time for Z8 was 12.6 seconds at 112 mph. M5 was 12.4 seconds at 116 mph.
Final drive ratio on Z8 is 3.38. M5 is 3.62.
The M5's final drive ratio is equal to a 7% increase in torque when compared to the Z8 at all rpms.
Rear tire diameters are very close.
Z8 has 6-speeds. M5 has 7 speeds.
Ratios: Z8 / M5
1st 4.23 (6% advantage) / 3.99
2nd 2.53 / 2.65 (5% advantage)
3rd 1.67 / 1.81 (8% advantage)
4th 1.23 / 1.39 (13% advantage)
5th 1.00 / 1.16 (16% advantage)
6th 0.83 / 1.00 (20% advantage)
7th NA / 0.83
Z8 engine displacement is 4941 cc.
M5 engine displacement is 4999 cc.
Z8 horsepower is 394 @ 6600 rpm with 368 lb/ft of torque at 3800 rpm.
M5 horsepower is 500 @ 7750 rpm with 383 lb/ft of torque at 6100 rpm.
Z8 engine redline is 7000 rpm. M5 is 8250 rpm.
Z8 curb weight (according to BMW) is 3494 lbs. (*actual curb weight of Z8 is 3685 lbs.) M5 is 4035 lbs. according to BMW.
Z8 weight to horsepower ratio = 8.87 (lbs/hp) (*9.35) M5 = 8.07
Z8 weight to torque ratio = 9.49 (lbs/lb-ft) (*10.01) M5 = 10.51
If we factor in the 7% torque advantage the M5 has due to its final drive ratio the M5's lbs/lb-ft ratio becomes 9.84.