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

BMW 3 Series Gran Turismo M340i

Hatchback · Gasoline · FWD

vs

Mercedes-Benz CLA 45 AMG

Hatchback · Gasoline · FWD

BMW 3 Series Gran Turismo M340i

Car A

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 safety

Mercedes-Benz CLA 45 AMG

Car B

Mercedes-Benz CLA 45 AMG

Combining compact 5-seat practicality with standout performance and efficiency for its class, the Mercedes-Benz CLA 45 AMG is quick without being thirsty. It suits buyers who want a rapid, city-friendly performance car with solid safety standing and reasonable running costs.

5 seatsHatchbackGasoline5-star safety7.5 L/100km421 hp

Why compared more powerbetter valuecomparison pickalternative pickcross brandsame body type

Usage fit

Family 58 / 63

City 40 / 53

Budget / value 37 / 55

Road trip 54 / 41

Performance 35 / 36

Cargo 28 / 20

Practical 39 / 50

Premium 60 / 55

Winter 30 / 26

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

Specs side-by-side

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

Values are representative — confirm for your market and trim.

Pros & cons

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

Mercedes-Benz CLA 45 AMG

Very quick for its segment: 0–100 km/h in 4.0 s boosts confidence for overtakes and ramps
Efficient for its class at 7.5 L/100 km given the 421 hp output
Compact size suits city driving and parking
Seats 5 with a usable 370 L trunk for everyday family needs
Front-wheel drive may limit traction in slippery conditions or hard launches versus AWD rivals
370 L trunk and conventional trunk layout reduce cargo flexibility compared with hatchbacks
Compact footprint means less rear space than larger family sedans
Premium pricing relative to mainstream compacts, even if performance value is strong

Verdict

Pick BMW 3 Series Gran Turismo M340i if…

Efficiency & everyday ease

BMW 3 Series Gran Turismo M340i is the choice if fuel economy and city-friendly driving are your priority.

Pick Mercedes-Benz CLA 45 AMG if…

More power

Mercedes-Benz CLA 45 AMG puts out 421 hp vs 374 — meaningfully quicker and more confident on motorways.

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