Honda V6 hybrid Formula One power unit
| Honda V6 hybrid F1 power unit | |
|---|---|
The Honda RA621H power unit, used in the 2021 season | |
| Overview | |
| Manufacturer | Honda |
| Production | 2015–present |
| Layout | |
| Configuration | 90° V6 with single MGU-H hybrid turbo and MGU-K kinetic electric motor (2014-2025), 90° V6 with single turbo and MGU-K kinetic electric motor (2026-) |
| Displacement | 1.6 L (98 cu in) |
| Cylinder bore | 80 mm (3.15 in) |
| Piston stroke | 53 mm (2.09 in) |
| Cylinder block material | Aluminium alloy |
| Cylinder head material | Aluminium alloy |
| Valvetrain | 24-valve (four-valves per cylinder), DOHC |
| Compression ratio | 13:1 - 18:1 (2015-2025), 16:1 (2026-) |
| RPM range | |
| Idle speed | 3,000 rpm |
| Max. engine speed | 15,000 rpm |
| Combustion | |
| Turbocharger | Hybrid turbocharger with 3.5–5.0 bar boost pressure |
| Management | McLaren TAG-320 (2014-2018) later TAG-320B (2019-present) |
| Fuel type | 2015-2016 and 2018-2021: Esso/Mobil Synergy unleaded gasoline 94.25% + 5.75% biofuel 2017: BP Ultimate unleaded gasoline 94.25% + 5.75% biofuel 2022-2025: Mobil Synergy unleaded gasoline 90% + 10% E10 biofuel 2026+: Aramco ProForce+ 100% Carbon Neutral Synthetic Fuel |
| Output | |
| Power output | 830–1,080 hp (619–805 kW) |
| Dimensions | |
| Dry weight | 145–150 kg (320–331 lb) overall |
| Chronology | |
| Predecessor | Honda V8 F1 engine |
The Honda RA6xxH/RBPTH hybrid power units are a series of 1.6-litre, hybrid turbocharged V6 racing engines which from 2014 through to present, featured both a kinetic energy recovery (MGU-K) electric motor directly geared to the crankshaft and a heat energy recovery (MGU-H) electric motor attached via a common shaft to the turbocharger assembly. From 2026 onwards, new power unit regulations mandated the removal of the MGU-H electric motor. Developed and produced by Honda Motor Company (and subsequently under their Honda Racing Corporation organisation from 2022) for use in Formula One. The engines have been in use since the 2015 Formula One season, initially run by the then newly re-established McLaren Honda works team. Over years of development, power unit output was increased from approximately 760 to over 1,000 horsepower while utilising the same amount of fuel, as mandated by enforced technical regulations (Fuel Mass Flow Rate limit of 100kg per hour). Teams utilising the engines over the years include McLaren, Scuderia Toro Rosso, Scuderia AlphaTauri, Racing Bulls, Red Bull Racing, and Aston Martin.