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      12-20-2010, 01:41 AM   #42
HBspeed
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Drives: 05 M3, 00 Z3MC, Boxster Spyder
Join Date: Nov 2007
Location: Huntington Beach, CA

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Quote:
Originally Posted by Eau Rouge View Post

E30 M3: 1,202 kg/220 hp = 5.46 hp/kg

E36 M3: 1,461 kg/286 hp = 5.11 hp/kg

Wt:HP ratio 5.11/5.46 = 0.94 (or a 6% decrease in the wt:hp ratio in the E36 in relation to the E30)
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E46 M3: 1,571 kg/343 hp = 4.58 hp/kg

Wt:HP ratio 4.58/5.11 = 0.90 (or a 10% decrease in the wt:hp ratio in the E46 in relation to the E36)
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E92 M3: 3.8 kg * 420 hp = 1,596 kg (Wt/hp source: Official BMW M3 International Launch information (Please see attachment page 17). Yes, the official “unladen” weight is 3704 or 1,683 kg which doesn’t quite mesh with the equally “official” 3.8kg-to-1hp. )

Wt:HP ratio 3.8 kg/4.58 kg = 0.83 (or a 17% decrease in the wt:hp ratio of E92 in relation to the E46)

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Over four generations the weight-to-horsepower ratio has been reduced by 6%, 10%, and 17% while horsepower has increased by 30%, 20%, and 22%. At the same time, weight has increased by 22%, 8%, and 2%.

I'm sorry buy your weight figures are way off. Therefore your power to weight ratios are also way off.


DIN curb weight (preliminary as they call it):

E30 M3 at 1,225 kg = 2,701 lbs

E36 M3 at 1,385 kg = 3,053 lbs

E46 M3 at 1,474 kg = 3,250 lbs

E82 1M at 1,495 kg = 3,296 lbs

E92 M3 at 1,605 kg = 3,538 lbs


EU standard weight:

E30 M3 at 1,300 kg = 2,865 lbs

E36 M3 at 1,460 kg = 3,219 lbs

E46 M3 at 1,549 kg = 3,415 lbs

E82 1M at 1,570 kg = 3,461 lbs

E92 M3 at 1,680 kg = 3,704 lbs


EU is DIN + 68kg driver and 7kg luggage.