Road Tests Real world tests of 911 GT3 vs C63 AMG

Differences What are the advantages of each

Side view of Porsche 911 GT3

Reasons to consider the
Porsche 911 GT3 (997 Mk2)

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Faster top speed 195 mph vs 155 mph 40 more mph; leaves lesser cars in the dust on the straights
More expensive sticker price $112k vs $87k Around 30% more expensive harder to own
Lighter curb weight 3,027 lb vs 3,814 lb More than 20% lighter curb weight; less inertia to overcome when accelerating
Slightly better power-to-weight ratio 7.06 lb/hp vs 7.95 lb/hp More than 10% better power-to-weight ratio
Car-autoblog view of Mercedes-Benz C63 AMG

Reasons to consider the
Mercedes-Benz

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More torque 442 ft-lb @ 5,000 RPM vs 318 ft-lb @ 6,250 RPM Around 40% stronger engine from a stand-still; more acceleration power
Much bigger engine 6,208 cc vs 3,800 cc Around 65% bigger engine
More powerful engine 480 HP @ 6,800 RPM vs 429 HP @ 7,600 RPM More than 10% stronger engine

Specifications Full list of technical specs

general

911 GT3  vs
C63 AMG 
Brand Porsche Mercedes-Benz
Price 112,200 87,462
Type of car Production car Production car
Year 2009 2012
City mileage 14 MPG 14 MPG
Highway mileage 21 MPG 20 MPG

power & handling

Power-to-weight ratio 7.06 lb/hp 7.95 lb/hp
Maximum hp 429 HP @ 7,600 RPM 480 HP @ 6,800 RPM
Maximum torque 318 ft-lb @ 6,250 RPM 442 ft-lb @ 5,000 RPM
Steering system Rack and pinion Rack and pinion

suspension, wheels & brakes

Front brakes 14.96 in Disc Disc
Rear brakes 13.78 in Disc Disc
Front wheels 483/? 216 483/? 203
Rear wheels 483/? 305 483/? 229

physical dimensions

Curb weight 3,027 lb 3,814 lb
Width 2.8 in 70.7 in
Height 2 in 56.6 in
Length 6.9 in 186 in
Front track width 2.3 in 61.7 in
Wheelbase 3.6 in 108.9 in

road tests

911 GT3  vs
C63 AMG 
Top speed 195 mph 155 mph
1/4 mile 11.8 s 12.1 s
0-60mph 3.6 s 3.7 s
0-100mph 8.2 s 8.6 s

transmission

Drivetrain RWD w/PSM RWD
Gearing Traditional Traditional
# of gears 6 7

engine

Displacement 3,800 cc 6,208 cc
Cylinders I6 V8
Air compressor None None
Fuels
Gas
Compression ratio 12:1 11.3:1
Bore/stroke 4 in / 3 in 4.02 in / 3.72 in
Valvetrain DOHC DOHC
Valves per cylinder 4 4
Porsche 911 GT3 (997 Mk2)
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Mercedes-Benz
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