Power-to-weight ratioHigher is betterCalculated from peak power and curb weight — figures quoted against a different weight basis (e.g. dry or DIN) will differ.
322.7 hp/t✓ BestCalculated
316.7 hp/tCalculated
Lateral accelerationSkidpad radius and surface affect results.
1.07 gIndependent test · MotorTrend
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Acceleration
0–60 mphLower is betterRollout (1ft) handling differs between testers and manufacturers.
2.90 s✓ TieManufacturer claim · Porsche
3.00 s✓ TieManufacturer claim · BMW
0–100 km/hLower is better
3.00 s✓ BestManufacturer claim · Porsche
3.20 sManufacturer claim · BMW
0–100 mph
—
6.30 sIndependent test · Car and Driver
0–200 km/hLower is better
10.7 sManufacturer claim · Porsche
10.6 s✓ BestManufacturer claim · BMW
Quarter-mile elapsed time
11.10 sManufacturer claim · Porsche
—
Braking
70–0 mph braking distance
—
146.0 ftIndependent test · Car and Driver
100–0 mph braking distance
—
288.0 ftIndependent test · Car and Driver
Engine & Powertrain
Peak powerHigher is better
532 hpManufacturer claim · Porsche
617 hp✓ BestManufacturer claim · BMW
Peak torqueHigher is better
449 lb-ftManufacturer claim · Porsche
553 lb-ft✓ BestManufacturer claim · BMW
Engine displacement
3600.0 ccManufacturer claim · Porsche
4395.0 ccManufacturer claim · BMW
Cylinder count
6Manufacturer claim · Porsche
8Manufacturer claim · BMW
Engine layout
Flat-6Manufacturer claim · Porsche
V8Manufacturer claim · BMW
Engine placement
RearManufacturer claim · Porsche
Dimensions
Length
179 inManufacturer claim · Porsche
191 inManufacturer claim · BMW
Width
73 inManufacturer claim · Porsche
75 inManufacturer claim · BMW
Height
51 inManufacturer claim · Porsche
53 inManufacturer claim · BMW
Wheelbase
97 inManufacturer claim · Porsche
111 inManufacturer claim · BMW
Weight
Curb weightLower is better
3635 lb✓ BestManufacturer claim · Porsche
4295 lbManufacturer claim · BMW
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 mpg✓ BestHomologation · US EPA
17.0 mpgHomologation · US EPA
Fuel economy (city)Higher is betterLower L/100km is better; higher mpg is better — direction is on the canonical L/100km.
17.0 mpg✓ BestHomologation · US EPA
15.0 mpgHomologation · 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 mpg✓ BestHomologation · US EPA
22.0 mpgHomologation · US EPA
Fuel tank capacity
16.6 galManufacturer claim · Porsche
20.1 galManufacturer claim · BMW
Estimated range (combined)Higher is betterEstimated from tank capacity and quoted combined economy — not an instrumented range.
Electric System
Battery gross capacity
1.9 kWhManufacturer claim · Porsche
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Practicality
Cargo volumeHigher is better
5 ft³Manufacturer claim · Porsche
15 ft³✓ BestManufacturer claim · BMW
Seats
4Manufacturer claim · Porsche
4Manufacturer claim · BMW
Pricing
Base price (as tested market)Demo prices only; not live FX.
$174,695Independent test · Kelley Blue Book
$138,800Independent test · Kelley Blue Book
Tires & Wheels
Front tire size
245/35 ZR20Manufacturer claim · Porsche
275/40ZR19Manufacturer claim · BMW
Rear tire size
315/30 ZR21Manufacturer claim · Porsche
285/40ZR19Manufacturer claim · BMW
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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