Road Tests Real world tests of BMW M6 vs 650i Gran Coupé

Top speed

BMW M6
155 mph
Top speed electronically limited to 155 mph.
BMW M6 | by cars.com (Jun, 2013)

Differences What are the advantages of each

Front view of BMW M6

Reasons to consider the
BMW M6

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Slightly more powerful engine 500 HP @ 7,750 RPM vs 445 HP @ 5,500 RPM More than 10% stronger engine
Bigger engine 5,000 cc vs 4,395 cc Around 15% bigger engine
Front view of BMW 650i Gran Coupé

Reasons to consider the
BMW 650i Gran Coupé

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More torque 480 ft-lb @ 2,000 RPM vs 385 ft-lb @ 6,100 RPM Around 25% stronger engine from a stand-still; more acceleration power

Specifications Full list of technical specs

general

BMW M6  vs
650i Gran Coupé 
Brand BMW BMW
Type of car Production car Production car
Year 2007-2010 2013

power & handling

Power-to-weight ratio 8.49 lb/hp 9.61 lb/hp
Maximum hp 500 HP @ 7,750 RPM 445 HP @ 5,500 RPM
Maximum torque 385 ft-lb @ 6,100 RPM 480 ft-lb @ 2,000 RPM
Steering system Rack and pinion Rack and pinion

engine

Displacement 5,000 cc 4,395 cc
Cylinders V10 V8
Fuels
Gas
Bore/stroke 3.62 in / 2.96 in 3.5 in / 3.5 in
Valves per cylinder 4 4

physical dimensions

Curb weight 4,246 lb 4,278 lb
Width 73 in 74.6 in
Height 54.2 in 54.8 in
Length 191.8 in 197.1 in
Front track width 61.7 in 63 in
Wheelbase 109.5 in 116.9 in

road tests

BMW M6  vs
650i Gran Coupé 
Top speed 155 mph 155 mph

transmission

Drivetrain RWD w/DSC, M Differential Lock RWD
Gearing Traditional Traditional
# of gears 7 8
Gear ratios
1: 3.99:1
2: 2.65:1
3: 1.81:1
4: 1.39:1
5: 1.16:1
6: 1:1
7: 0.83:1
8: 0.67:1
Axle ratio 3.62:1 2.81:1

suspension, wheels & brakes

Front brakes Disc Disc
Rear brakes Disc Disc
Front wheels 483/? 216 457/? 203
Rear wheels 483/? 241 457/? 203
BMW M6
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BMW 650i Gran Coupé
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