Calculated from peak power and curb weight — figures quoted against a different weight basis (e.g. dry or DIN) will differ.
305.8 hp/t✓ BestCalculated
256.0 hp/tCalculated
Lateral accelerationHigher is betterSkidpad radius and surface affect results.
1.07 g✓ TieIndependent test · Edmunds
1.07 g✓ TieIndependent test · Edmunds
Acceleration
0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers.
3.80 sIndependent test · Edmunds
3.50 s✓ BestIndependent test · Edmunds
0–100 km/hLower is better
3.80 s✓ BestManufacturer claim · BMW
4.10 sManufacturer claim · Porsche
0–100 mphLower is better
7.00 s✓ BestIndependent test · Car and Driver
7.80 sIndependent test · Car and Driver
0–200 km/hLower is better
11.7 s✓ BestManufacturer claim · BMW
14.4 sManufacturer claim · Porsche
Quarter-mile elapsed timeLower is better
11.40 s✓ BestIndependent test · Edmunds
11.70 sIndependent test · Edmunds
Braking
60–0 mph braking distanceLower is better
110.0 ftIndependent test · Edmunds
102.0 ft✓ BestIndependent test · Edmunds
70–0 mph braking distanceLower is better
155.0 ftIndependent test · Car and Driver
138.0 ft✓ BestIndependent test · Car and Driver
100–0 mph braking distanceLower is better
291.0 ftIndependent test · Car and Driver
275.0 ft✓ BestIndependent test · Car and Driver
Engine & Powertrain
Peak powerHigher is better
523 hp✓ BestManufacturer claim · BMW
388 hpManufacturer claim · Porsche
Peak torqueHigher is better
479 lb-ft✓ BestManufacturer claim · BMW
331 lb-ftManufacturer claim · Porsche
Engine displacement
2993.0 ccManufacturer claim · BMW
3000.0 ccManufacturer claim · Porsche
Cylinder count
6Manufacturer claim · BMW
6Manufacturer claim · Porsche
Engine layout
Inline-6Manufacturer claim · BMW
Flat-6Manufacturer claim · Porsche
Engine placement
FrontIndependent test · Wikipedia
Rear
Dimensions
Length
181 inManufacturer claim · BMW
179 inManufacturer claim · Porsche
Width
74 inManufacturer claim · BMW
80 inManufacturer claim · Porsche
Height
55 inManufacturer claim · BMW
51 inManufacturer claim · Porsche
Wheelbase
108 inManufacturer claim · BMW
97 inManufacturer claim · Porsche
Ground clearance
5 inManufacturer claim · BMW
—
Weight
Curb weightLower is better
3770 lbManufacturer claim · BMW
3342 lb✓ BestManufacturer claim · Porsche
Fuel Economy
Fuel economy (combined)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.
19.0 mpgHomologation · US EPA
21.0 mpg✓ BestHomologation · US EPA
Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.
16.0 mpgHomologation · US EPA
18.0 mpg✓ BestHomologation · US EPA
Fuel economy (highway)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.
23.0 mpgHomologation · US EPA
25.0 mpg✓ BestHomologation · US EPA
Fuel tank capacity
13.7 galManufacturer claim · BMW
16.6 galManufacturer claim · Porsche
Estimated range (combined)Higher is betterEstimated from tank capacity and quoted combined economy — not an instrumented range.
260 mi
Practicality
Cargo volumeHigher is better
14 ft³✓ BestManufacturer claim · BMW
5 ft³Manufacturer claim · Porsche
Seats
4Manufacturer claim · BMW
4Manufacturer claim · Porsche
Pricing
Base price (as tested market)Demo prices only; not live FX.
$98,600Manufacturer claim · BMW
$120,100Homologation · US EPA
Aerodynamics
Drag coefficient (Cd)
—
0.30 :1Independent test · CarreraFever
Tires & Wheels
Front tire size
275/35 ZR19Manufacturer claim · BMW
235/40 ZR19Manufacturer claim · Porsche
Rear tire size
285/30 ZR20Manufacturer claim · BMW
295/35 ZR20Manufacturer claim · Porsche
Every figure is the car’s preferred, sourced value. “Best” marks the strongest value in a row, judged on the canonical measurement (so a winner is correct whichever unit system you view). Open a car to see each value’s source, original units, and alternates.
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