Toyota Prius
The production hybrid that brought Toyota's petrol-electric powertrain from a 1997 Japanese saloon to a global model family.
Overview
Toyota developed the Prius from its G21 project, an early-1990s programme created to investigate a resource-efficient car for the 21st century. Work moved towards a hybrid powertrain in 1994, and a concept appeared at the 1995 Tokyo Motor Show. Toyota unveiled the production car in October 1997 and placed it on sale in Japan that December.
The Toyota Hybrid System combined a petrol engine with electric motor-generators, a battery and a power-split transmission. It could move the car using the engine, electric power or both, while regenerative braking recovered energy that would otherwise be lost as heat. The first Prius achieved a Japanese 10-15-cycle rating of 28.0 km/L, approximately twice the fuel economy Toyota quoted for a comparable conventional car.
Originally a compact four-door saloon, the Prius became a five-door liftback with its 2003 redesign. Its rising roof and tapered tail formed the recognisable “triangle silhouette” used by the next two generations. Later versions extended the idea into plug-in hybrid derivatives while Toyota applied related hybrid systems across a much wider vehicle range.
Generations
First generation (1997–2003)
The first Prius used a 1.5-litre petrol engine and the original Toyota Hybrid System. Sales began in Japan before an updated version reached Europe, North America and other markets in 2000. Toyota recorded approximately 123,000 first-generation sales.
Second generation (2003–2009)
The second generation introduced the liftback body and Toyota Hybrid System II, marketed as Hybrid Synergy Drive. The new arrangement increased electric-motor contribution, improved performance and raised the Japanese test-cycle fuel-economy figure to 35.5 km/L.
Third generation (2009–2015)
A larger 1.8-litre engine replaced the earlier 1.5-litre unit, allowing lower engine speeds in many driving conditions. The range expanded to include a plug-in hybrid, while the standard car retained the established high-roofed aerodynamic profile.
Fourth generation (2015–2022)
The fourth Prius was Toyota’s first global model based on the Toyota New Global Architecture. A lower centre of gravity, a more rigid body and revised suspension accompanied further efficiency improvements, and a second-generation plug-in version was sold as the Prius Prime in some markets.
Fifth generation (2022–present)
Unveiled in November 2022, the fifth generation adopted a lower, more cab-forward shape. Depending on market, Toyota offered parallel-hybrid and plug-in hybrid powertrains, including 2.0-litre versions with substantially greater output than their predecessors.