Manufacturers use hybrid technology in vastly different ways. While the Toyota Prius achieves 55 mpg combined, some carmakers pair hybrid systems with high-performance engines to prioritize power over efficiency.
Seven hybrids fall below 20 mpg combined, well under the 2024 model year average of 27.2 mpg. The list spans exotics, performance SUVs, and trucks: the Lamborghini Revuelto, Chevrolet Corvette ZR1X, Audi RS Q8, BMW X5 M Competition, Mercedes-AMG GLS 63, Toyota Tundra TRD Pro, and Chevrolet Silverado 1500 Hybrid.
The Toyota Tundra TRD Pro rates highest among this group at 19 mpg combined. Its twin-turbocharged 3.4-liter V6 hybrid system produces 437 horsepower and 583 lb-ft of torque. The off-road running gear of the TRD Pro trim likely costs it 1 mpg versus other Tundra hybrids that exceed 20 mpg. The parallel hybrid setup incorporates an electric motor between the engine and transmission to maximize power and torque.
General Motors experimented with hybrid Silverado 1500s starting in 2005, pairing a 295-horsepower 5.3-liter V8 with a start-stop electrical system. EPA ratings reached 17 mpg for rear-wheel drive and 16 mpg for four-wheel drive versions. Production of the hybrid Silverado and its GMC Sierra counterpart totaled about 3,000 units.
The 2024 Audi RS Q8 pairs a twin-turbocharged 4.0-liter V8 making 591 horsepower with a mild-hybrid system that recovers braking energy. The result: 15 mpg combined, versus 19 mpg for the standard Q8. For 2025, Audi increased output to 631 horsepower and improved fuel economy slightly to 16 mpg.
BMW's X5 M Competition uses a 4.4-liter twin-turbocharged V8 producing 617 horsepower with mild-hybrid assistance, achieving 15 mpg combined. The five-seater reaches 60 mph in 3.4 seconds and offers 72.3 cubic feet of cargo space.
Mercedes-AMG's 2022 GLS 63 also rates 15 mpg combined but carries more passengers and cargo than its German rivals. A twin-turbocharged 4.0-liter V8 makes 603 horsepower. The three-row SUV weighs approximately 6,000 pounds and reaches 60 mph in as low as 3.6 seconds.
Chevrolet's 2026 Corvette ZR1X combines General Motors' LT7 twin-turbocharged 5.5-liter V8 with a front-axle electric motor for 1,250 combined horsepower. The $200,000-plus hybrid coupe rates 14 mpg combined and accelerates from 0 to 60 mph in 2.1 seconds. The optional ZTK Performance Package reduces that time to 1.89 seconds.
At 12 mpg, the Lamborghini Revuelto ranks lowest. This plug-in hybrid combines a 6.5-liter V12 engine with three electric motors producing 1,011 horsepower total. The 3.8-kWh battery provides only about 5 miles of all-electric range. The Revuelto reaches 60 mph in 2.2 seconds with a top speed of 217 mph.