2026 BMW M3 vs 2026 BMW M4

Starting with powertrains, both the M3 and M4 Competition models share the 3.0-liter twin-turbo inline-6 engine. In standard form, the M3 and M4 deliver roughly 473 horsepower, while the Competition versions crank that up to 503 horsepower, with torque hovering around 479 lb-ft. Both cars use BMW’s 8-speed automatic transmission in Competition trims (manual is available on standard M3 in some markets), sending power to all four wheels via the M xDrive system, or rear-wheel drive if you prefer classic handling thrills. The performance numbers are near-identical: 0–60 mph times hover around 3.8 seconds for Competition models, making either car blisteringly quick.

Dimensions and weight are where the distinction starts to show. The M3 sedan has four doors and a slightly heavier curb weight, giving it a bit more practicality for passengers and cargo. The M4, as a coupe or convertible, is slightly lighter and lower, which can improve aerodynamics and handling. That means cornering feels a touch sharper in the M4, while the M3’s extra doors and slightly higher ride height make it a bit more versatile for daily use.

When comparing M3 vs M4 BMW, the interior is largely shared: sport seats, premium materials, digital displays, and advanced infotainment are standard on both. Cargo space is more limited in the M4 coupe and convertible, but the cabin itself feels just as driver-focused as the M3. Both offer customizable driving modes, adaptive suspension, and M-specific technology like torque vectoring, active rear differential, and track-capable cooling systems.

For those eyeing the M4 Competition vs M3 Competition, performance is virtually neck and neck. The choice really comes down to style and practicality: the M4 delivers a sleeker, more aggressive look, especially with the coupe’s fastback roofline or the open-air convertible option, while the M3 maintains the sedan’s iconic four-door profile and slightly more everyday usability.

So, the difference between M3 and M4 boils down to body style and minor handling nuances. Both are high-octane, track-capable machines with almost identical specs, but if you want a practical sports sedan, the M3 is your ride; if you want a coupe or convertible that turns heads, the M4 is the one to pick. Either way, you’re getting BMW’s engineering at its sharpest — a perfect blend of power, precision, and everyday usability.