DecodedCarsLexus GX vs Porsche Cayenne
2026 Lexus GX vs 2026 Porsche Cayenne — two standard SUVs compared on efficiency, size, safety and reliability.
The short version
The Porsche Cayenne is more fuel-efficient: 19 vs 17 MPG combined in its best version.
That works out to about $500 a year less in fuel for the Porsche Cayenne (EPA estimate, 15,000 miles).
The Lexus GX is the bigger car, about 3 inches longer.
Across all model years since 2005, the Lexus GX has had fewer recall campaigns (15 vs 28).
The two cars
The 2026 Lexus GX is a standard SUV offered with a 3.4L 6-cyl turbo engine and 4-wheel drive. It measures about 197 inches long and 78 inches wide on a 112-inch wheelbase, with a curb weight of roughly 5,666 lb.
The 2026 Porsche Cayenne is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo) and all-wheel drive. It measures about 194 inches long and 78 inches wide on a 114-inch wheelbase, with a curb weight of roughly 4,376 lb (Base / S 4dr SUV).
Buying used? The 2021 GX and the 2018 Cayenne have the fewest problems in our data; avoid the 2024 GX and the 2019 Cayenne.
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 Lexus GX if…
- You want more room (3 in longer)
- You put reliability history first (15 vs 28 recalls since 2005)
Choose the Porsche Cayenne if…
- You want lower fuel bills (19 vs 17 MPG)
- You want more power (up to 493 vs 349 hp)
- You want something easier to park (3 in shorter)
Pros & cons of each
2026 Lexus GX
- Lots of standard safety tech5 of 5 key driver aids standard on the versions we checked.
- Below-average fuel economyBest version gets 17 MPG combined, 15% below the 2026 standard SUV average of 20 MPG.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
2026 Porsche Cayenne
- Lots of standard safety tech4 of 5 key driver aids standard on the versions we checked.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Full 2026 Lexus GX specs →Full 2026 Porsche Cayenne specs →Compare fuel costs for your driving →Compare size & garage fit →