Differences What are the advantages of each

Front view of Porsche 911 GT3 Cup

Reasons to consider the
Porsche 911 GT3 Cup

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Higher redline 7,800 RPM vs 6,800 RPM Around 15% more revs
Car-autoblog view of Porsche 911 GT2 RS

Reasons to consider the
Porsche 911 GT2 RS

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Has an air compressor Twin turbocharger vs None Most supercars don't have an air compressor
More powerful engine 612 HP @ 6,500 RPM vs 460 HP Around 35% stronger engine

Specifications Full list of technical specs

general

911 GT3 Cup  vs
GT2 RS 
Brand Porsche Porsche
Price 237,372 245,950
Type of car Race car Production car
Year 2013 2010

transmission

Drivetrain RWD RWD w/PSM, LSD
Gearing Traditional Traditional
# of gears 6 6
Axle ratio 3.44:1 3.44:1

suspension, wheels & brakes

Front brakes Disc Brembo 14.96 in Disc
Rear brakes Disc Brembo 13.78 in Disc
Front wheels 508/? 216 483/? 19
Rear wheels 508/? 279 483/? 19

power & handling

911 GT3 Cup  vs
GT2 RS 
Maximum hp 460 HP 612 HP @ 6,500 RPM
Max RPM 7,800 RPM 6,800 RPM
Steering system Rack and pinion Rack and pinion

engine

Displacement 3,800 cc 3,600 cc
Cylinders Flat 6 Flat 6
Air compressor None Twin turbocharger
Fuels
Gas
Compression ratio 12.5:1 9:1
Bore/stroke 4.02 in / 3.05 in 3.94 in / 3.01 in
Valvetrain DOHC DOHC
Valves per cylinder 4 4

physical dimensions

Width 71.2 in 72.9 in
Height 51 in 58.3 in
Length 176.8 in 175.9 in
Front track width 60.6 in 59.4 in
Wheelbase 96.5 in 92.5 in
Porsche 911 GT3 Cup
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Porsche 911 GT2 RS
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