DecodedCarsBMW X4 vs Mercedes-Benz G-Class
2025 BMW X4 vs 2025 Mercedes-Benz G-Class — two rivals compared on efficiency, size, safety and reliability.
The short version
The BMW X4 is more fuel-efficient: 24 vs 18 MPG combined in its best version.
That works out to about $2,200 a year less in fuel for the Mercedes-Benz G-Class (EPA estimate, 15,000 miles).
The BMW X4 is the bigger car, about 6 inches longer.
Across all model years since 2005, the Mercedes-Benz G-Class has had fewer recall campaigns (0 vs 28).
The two cars
The 2025 BMW X4 is a small SUV offered with 2 engines (2.0L 4-cyl turbo and 3.0L 6-cyl turbo), including a hybrid version and all-wheel drive. It measures about 187 inches long and 76 inches wide on a 113-inch wheelbase, with a curb weight of roughly 4,323 lb (M40i 4dr SUV).
The 2025 Mercedes-Benz G-Class is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo), including a hybrid version and 4-wheel drive. It measures about 182 inches long and 76 inches wide on a 114-inch wheelbase, with a curb weight of roughly 5,479 lb (550 4dr SUV).
Buying used? The 2024 X4 and the 2024 G-Class have the fewest problems in our data; avoid the 2020 X4.
Basics
Efficiency
Performance & space
Safety & reliability
Interest
Green = clearly better. Prices are not included. How we calculate this →
Which one should you choose?
Choose the BMW X4 if…
- You want lower fuel bills (24 vs 18 MPG)
- You want more room (6 in longer)
Choose the Mercedes-Benz G-Class if…
- You want an EV with more range (239 miles)
- You want something easier to park (6 in shorter)
- You put reliability history first (0 vs 28 recalls since 2005)
Pros & cons of each
2025 BMW X4
- Hybrid version availableOffered as a hybrid as well as gas.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
- Modest powerUp to 248 hp, versus about 335 hp for similar 2025 models.
2025 Mercedes-Benz G-Class
- Hybrid version availableOffered as a hybrid and electric as well as gas.
- No recalls so far
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Full 2025 BMW X4 specs →Full 2025 Mercedes-Benz G-Class specs →Compare fuel costs for your driving →Compare size & garage fit →