Mercedes-Benz AMG CLA 45 vs BMW 3 Series Gran Turismo M340i — full comparison

Mercedes-Benz AMG CLA 45

Hatchback · Gasoline · FWD

vs

BMW 3 Series Gran Turismo M340i

Hatchback · Gasoline · FWD

Mercedes-Benz AMG CLA 45

Car A

Mercedes-Benz AMG CLA 45

Delivers serious performance—3.9 s to 100 km/h and 270 km/h top speed—while still offering 5 seats and a 460 L trunk. A strong fit for drivers who need family-capable practicality but prioritize acceleration and response.

5 seatsHatchbackGasoline5-star safety421 hp

BMW 3 Series Gran Turismo M340i

Car B

BMW 3 Series Gran Turismo M340i

A rapid 5-seat hatchback that blends strong performance with everyday practicality and good value in its segment. Best for families who want speed and road-trip ease, less ideal for cargo-heavy or winter-focused use.

5 seatsHatchbackGasoline5-star safety8.1 L/100km

Why compared cross brandsame body typesame powertrainsame seatssimilar price

Usage fit

Family 66 / 58

City 52 / 40

Budget / value 54 / 37

Road trip 43 / 54

Performance 38 / 35

Cargo 25 / 28

Practical 51 / 39

Premium 55 / 60

Winter 26 / 30

Scores out of 100. Blue = Mercedes-Benz AMG CLA 45 · Orange = BMW 3 Series Gran Turismo M340i

Specs side-by-side

Spec Mercedes-Benz AMG CLA 45 BMW 3 Series Gran Turismo M340i

Values are representative — confirm for your market and trim.

Pros & cons

Mercedes-Benz AMG CLA 45

3.9 s 0–100 km/h and 270 km/h top speed for standout performance
421 hp and 500 Nm enable confident overtakes and highway merging
Seats 5 with a 460 L trunk, workable for growing families and city errands
8.2 L/100 km combined is efficient for its class and good value at this price point
Front-wheel drive may limit traction and winter confidence
Less cargo flexibility than larger family vehicles despite a decent trunk
Price near 55,000 can exceed mainstream-compact budgets
Not the most frugal choice for long commutes versus non-performance models

BMW 3 Series Gran Turismo M340i

Very quick acceleration (0–100 km/h in 4.4 s) from 374 hp for confident passing and merges
5-seat hatchback with a 500 L trunk suits growing families and road trips
8.1 L/100 km combined consumption is efficient for its class given the output
At $54,900, offers good value in its segment for the performance on tap
Gasoline-only powertrain with no electric driving range
Front-wheel drive may be less appealing for buyers prioritizing AWD winter traction
500 L cargo space can feel limited for cargo-heavy use versus larger wagons or SUVs
Price remains higher than non-performance family hatchbacks

Verdict

Pick Mercedes-Benz AMG CLA 45 if…

Efficiency & everyday ease

Mercedes-Benz AMG CLA 45 is the choice if fuel economy and city-friendly driving are your priority.

Pick BMW 3 Series Gran Turismo M340i if…

Performance & capability

BMW 3 Series Gran Turismo M340i is the choice if you want more power, speed, or all-weather capability.

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