2023 BMW Z4 M40i

Sports Car · 3.0L Twin-Turbo I6 · RWD

79/100

AutoVault's overall score, weighted for what a sports car is actually for — performance, technology, comfort, reliability, safety and value.

Specifications

Engine	3.0L Twin-Turbo I6
Horsepower	382 hp
Torque	369 lb-ft
0–60 mph	4.5 sec
Top speed	155 mph
Drivetrain	RWD
Seats	2
Combined MPG	21 mpg (17 city / 26 hwy)
Range	371 miles
MSRP	$65,300
Body style	Sports Car

The verdict

What's good

Wind-in-hair drop-top fun
Eager, gutsy straight-six
Quick-folding soft top
Nicely balanced rear-drive feel

What's not

Tiny trunk swallows little luggage
No all-wheel-drive option
Soft top lets in more road noise
Firm ride over broken pavement

The engine

BMW Straight-Six

Twin-Turbo I6

A twin-turbocharged 3.0-liter straight-six in the great BMW inline tradition — perfectly balanced, free-revving, and savage in its M-division 'S' tune where it spins hard to a high redline.

The inline-six has been BMW's signature layout since 1933; in M cars this engine (the S58) is hand-assembled with a closed-deck block and forged crank derived from racing practice.

An inline-six is inherently perfectly balanced — no balance shafts needed, which is why BMW has championed the layout for 90 years.
The M-spec version shares its closed-deck block with BMW's GT racing engines.

See the rest in AutoVault

The six sub-scores behind the 79 — performance, tech, comfort, reliability, safety and value
Market value today and year-by-year value history
All 4 trims with pricing
Studio photography — exterior, rear and interior
Side-by-side comparison with up to four cars

Open in AutoVault