2026 BMW M4 Competition xDrive Convertible

Convertible · 3.0L TwinPower Turbo I6 · AWD

84/100

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

Specifications

Engine	3.0L TwinPower Turbo I6
Horsepower	503 hp
Torque	479 lb-ft
0–60 mph	3.5 sec
Top speed	155 mph
Drivetrain	AWD
Seats	4
Combined MPG	19 mpg (16 city / 23 hwy)
Range	327 miles
MSRP	$90,200
Body style	Convertible

The verdict

What's good

AWD system adds all-weather usability rare in open-top muscle cars
Fabric roof folds in seconds without leaving a hump behind
Inline-six sounds genuinely theatrical with the top down
Retained rear seat offers occasional short-hop passenger flexibility

What's not

Rear seats are only credible for children under about 5 feet
Trunk shrinks significantly with the top stowed in its well
Wind buffeting above motorway speeds even with wind deflector raised
High insurance premiums reflect the power-to-weight profile of this car

The engine

B58

3.0L Turbo I6

The B58 is BMW's celebrated single-turbo straight-six — buttery smooth and effortlessly torquey, delivering power in one seamless, silken surge to redline.

Heir to a BMW inline-six bloodline running back to 1933, the B58 belongs to the modular B-series family and is so over-built it's become a tuning and engine-swap legend.

Tuners regularly push the B58 past 600 hp on its stock internals.
Toyota chose the B58 to power the latest Supra.

See the rest in AutoVault

The six sub-scores behind the 84 — 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