The 2025 Toyota Tundra offers two versions of the same twin-turbo V6: the 389-hp i-FORCE and the 437-hp i-FORCE MAX hybrid with 583 lb-ft. There is no V8 anymore — and the numbers explain why Toyota is not bringing it back. Here are the specs, towing figures, and how the two powertrains differ in practice.
Engine specs: i-FORCE vs i-FORCE MAX
| Spec | i-FORCE | i-FORCE MAX hybrid |
|---|---|---|
| Engine | 3.4L twin-turbo V6 | 3.4L twin-turbo V6 + electric motor |
| Output | 389 hp / 479 lb-ft | 437 hp / 583 lb-ft |
| Transmission | 10-speed automatic | |
| Max towing | up to 12,000 lb | up to 11,450 lb |
| Fuel economy | ~20 mpg combined | 20 city / 24 highway |
Both engines out-torque the old 5.7-liter V8 by a wide margin. The hybrid’s electric motor sits between the engine and the 10-speed, so its 583 lb-ft arrives essentially instantly — the sensation towing a trailer uphill is what sells it. Counterintuitively, the hybrid tows slightly less than the gas truck: its battery adds weight that comes straight out of the rating. Buyers who tow at the limit should pick the plain i-FORCE; buyers who want the strongest daily-driving truck should take the MAX.
Trims and pricing
The range runs SR, SR5, Limited, Platinum, 1794 Edition, TRD Pro, and Capstone. The hybrid is standard from Limited upward in CrewMax form — an i-FORCE MAX CrewMax starts around $59,950 and a loaded Capstone opens at $82,670. The suspension story matters as much as the engine: this generation’s coil-spring rear axle rides far better than the leaf-sprung trucks it competes with, a point we also made about ride quality in the 2025 Ford F-150 engine guide — though the Ford still counters with a wider engine menu and a higher max tow rating.
The bottom line
The Tundra’s pitch is Toyota’s usual one — long-haul durability — now attached to genuinely modern powertrains. Both engines are turbocharged, which means both deliver their best numbers on premium fuel while running fine on regular; our octane explainer covers when that difference is worth paying for.
Specifications and pricing per Toyota dealer references and Kelley Blue Book 2025 data, September 2026. Photos: MercurySable99 and Kevauto / Wikimedia Commons, CC BY-SA 4.0.
