Differences What are the advantages of each

Side view of Porsche Boxster S

Reasons to consider the
Porsche Boxster S

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Great lap time on the Top Gear track 1:28.70 vs 1:33.0 Around 5% great lap time on the Top Gear track
Faster top speed 166 mph vs 155 mph 11 more mph; leaves lesser cars in the dust on the straights
Lighter curb weight 2,959 lb vs 3,408 lb Around 15% lighter curb weight; less inertia to overcome when accelerating
Side view of Mercedes-Benz SLK 55 AMG

Reasons to consider the
Mercedes-Benz

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A lot faster to 60mph 4.5 s vs 6.1 s More than 25% faster to 60mph
Significantly more torque 398 ft-lb @ 4,500 RPM vs 237 ft-lb @ 6,000 RPM Around 70% stronger engine from a stand-still; more acceleration power
More powerful engine 415 HP @ 6,800 RPM vs 276 HP More than 50% stronger engine
Much bigger engine 5,461 cc vs 3,200 cc More than 70% bigger engine
Slightly faster in the quarter mile 13 s vs 13.4 s Around 5% faster at the drag strip
Better power-to-weight ratio 8.21 lb/hp vs 10.72 lb/hp Around 25% better power-to-weight ratio

Specifications Full list of technical specs

general

Boxster S  vs
SLK 55 AMG 
Brand Porsche Mercedes-Benz
Price 53,895 50,000
Year 2005 2012

power & handling

Power-to-weight ratio 10.72 lb/hp 8.21 lb/hp
Maximum hp 276 HP 415 HP @ 6,800 RPM
Maximum torque 237 ft-lb @ 6,000 RPM 398 ft-lb @ 4,500 RPM
Steering system Rack and pinion Rack and pinion

engine

Displacement 3,200 cc 5,461 cc
Fuels
Gas
Bore/stroke 3.37 in / 3.07 in 3.9 in / 3.6 in

physical dimensions

Curb weight 2,959 lb 3,408 lb
Width 70.9 in 71.5 in
Height 51 in 51.2 in
Length 170.4 in 162.8 in
Wheelbase 96.5 in 95.7 in

road tests

Boxster S  vs
SLK 55 AMG 
Top speed 166 mph 155 mph
1/4 mile 13.4 s 13 s
0-60mph 6.1 s 4.5 s
Top gear time 1:28.70 1:33.0

transmission

Drivetrain RWD RWD
Gearing Traditional Traditional
# of gears 6 7

suspension, wheels & brakes

Front brakes Disc Disc
Rear brakes Disc Disc
Porsche Boxster S
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Mercedes-Benz
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