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TL;DR

BMW Z4 (G29) sDrive30iTourers
Biggest reason is Body Style (convertible).
Toyota Supra (A90) 2.0Racers, Minimalists
Biggest reason is Body Style (coupe).
Spec BMW Z4 (G29) sDrive30i Toyota Supra (A90) 2.0 Difference
Model Years 2019–2026 2021–2026
Release Date 2018-12-21 2020-08-21
Body Style convertible coupe
Configuration Inline 4 Inline 4
Displacement 2.0L (122 ci) 2.0L (122 ci)
Engine Code B48 B48
Crank cross-plane cross-plane
Aspiration turbocharged turbocharged
Fuel gasoline gasoline
Redline 6,500 rpm 6,500 rpm
Power 255 hp @ 5,000 rpm 255 hp @ 5,000 rpm
Torque 295 ft·lbs @ 1,550 rpm 295 ft·lbs @ 1,550 rpm
Compression 11.0:1 10.2:1 -7.3%
Bore × Stroke 82.0 × 94.6 mm 82.0 × 94.6 mm
Powertrain ICE ICE
Drivetrain RWD RWD
Transmission automatic 8-speed automatic 8-speed
Curb Weight 3,241 lbs 3,097 lbs -4.4%
Power-to-Weight 173 hp/ton 181 hp/ton +4.6%
0–100 km/h 5.2s 5.0s -3.8%
Top Speed 155 mph 155 mph
MSRP $43,900 $44,090 +0.4%
Fuel Economy 23 / 29 / 25 mpg 25 / 31 / 27 mpg +8.0%