Based on the Yaris three-door, the Toyota Yaris Hybrid-R concept features a motorsport-derived powertrain capable of delivering 420hp.

A 1.6-litre four-cylinder turbocharged petrol engine with direct injection drives the front wheels.  The engine, developed by Toyota Motorsport, complies with the FIA regulations for a Global Race Engine.

In addition, the rear wheels are each driven by a 60hp electric motor – the same motor used in the existing Yaris Hybrid.

The motors act as generators during braking, charging the super-capacitor located under the rear seat.  The capacitor has a higher power density and faster charge/discharge speeds than a traditional battery.

A third 60hp motor sits between the engine and six-speed sequential transmission to act as a generator during acceleration to both drive the rear motors and recharge the super-capacitor.  In effect, this third motor acts as a traction control system and is only brought into play when the front wheels run out of traction.

Externally, the Yaris Hybrid-R features a wider front grille with black and blue detailing, new headlights, a unique front bumper with large air intakes and funky blue LED daytime running lights.

Flared wheel arches cover 18-inch TRD alloy wheels wearing 225/40 R18 Michelin Pilot Sport Cup tyres.

The brakes have been upgraded with grooved and perforated discs acted on by six-piston front calipers and four-piston rears.

At the rear, a new roof-mounted spoiler and redesigned bumper with diffuser complete the look.

Inside, Recaro bucket seats are covered with black leather and blue Alcantara, which also extends on to the door panels and dashboard.

A steering wheel-mounted selector provides access to Track, Road and Boost functions.  Road mode reduces engine output and uses the super-capacitor and electric motors to aid fuel economy.  In this mode, the hybrid system can deliver 40hp for up to 10 seconds and, depending on the available charge, drive the Yaris in electric-only mode for short distances.

Track mode unleashes the full capability of the hybrid system, with 120hp available from the electric motors for up to 5 seconds.

The motors can operate independently of each other, particularly when cornering to deliver a torque-vectoring effect.  For instance, braking force can be applied to one wheel while the other accelerates to help reduce understeer.