| Production: | 2011-2021 |
| McLaren M838T engine | |
| Manufacturer: | McLaren & Ricardo PLC |
| Configuration: | 90° flat-plane V8 |
| Valvetrain: | DOHC 4 valves x cyl. |
| Displacement: | 3799cc |
| Bore: | 93mm |
| Stroke: | 69.9mm |
| Turbocharger: | MHI Twin-turbo with intercooler |
| Fueltype: | Petrol |
| Fuelsystem: | Fuel injection |
| Coolingsystem: | Water-cooled |
| Redline: | 8500 |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
| Weight: | 1990NaN0 |
| Successor: | McLaren M840T |
The McLaren M838T engine is a 3798.6cc 90-degree twin-turbocharged flat-plane V8, designed and developed in collaboration with Ricardo plc.[1]
The engine redlines at 8500 rpm, but 80% of the engine's torque is available as low as 2000 rpm.[2] [3] McLaren claims that the engine has the highest horsepower to emission ratio of any current production engine.[4]
The engine is built at Ricardo's engine assembly facility in Shoreham-by-Sea, West Sussex.[5] The turbochargers are supplied by Mitsubishi Heavy Industries (MHI), and are different units from those used in Mitsubishi Lancer Evolutions.[6]
The engine was designed and built for the McLaren MP4-12C, where it produces 600abbr=onNaNabbr=on @ 7000 rpm and 600abbr=onNaNabbr=on @ 3000 rpm of torque. In 2012 McLaren released an update increasing power to 625abbr=onNaNabbr=on @ 7500 rpm. For the GT3 racecar, the engine produces less power at only 500abbr=onNaNabbr=on.[7]
The engine has a bore and stroke of NaNabbr=onNaNabbr=on and a bore spacing of 108abbr=onNaNabbr=on.[8]
McLaren and Ricardo redeveloped the M838T engine for use in the McLaren P1. The engine has been upgraded to optimise cooling and durability under higher loads. The engine block has also been modified to incorporate an integrated electric motor as part of a hybrid drive train. The petrol engine produces 727abbr=onNaNabbr=on at 7,200 rpm with an additional 176abbr=onNaNabbr=on from the electric motor. At 4,000 rpm the engine is said to produce 720abbr=onNaNabbr=on of torque while the electric motor can produce a maximum of 260abbr=onNaNabbr=on from 0 rpm upwards.[9]
| Models | Years | Codename | Power | Torque |
|---|---|---|---|---|
| MP4-12C | 2011 - 2012 | M838T | 6000NaN0 @ 7000 rpm | 6000NaN0 @ 3000 rpm |
| 2013 - 2014 | 6250NaN0 @ 7500 rpm | |||
| MP4-12C GT3 | 2011 - 2015 | 5000NaN0 | - | |
| 650S | 2014 - 2017 | 6500NaN0 @ 7250 rpm | 6800NaN0 @ 6000 rpm | |
| 675LT | 2015 - 2017 | 6750NaN0 @ 7100 rpm | 7000NaN0 @ 5500 rpm | |
| MSO 688 HS | 2016 - 2017 | 6880NaN0 | ||
| P1 | 2013 - 2015 | M838TQ | 7370NaN0 @ 7200 rpm Electric: 1790NaN0 Total: 916PS | 7200NaN0 Electric: 2600NaN0 Total: 9800NaN0 |
| P1 GTR/LM | 2015 - 2017 | 8000NaN0 @ 7250 rpm Electric: 2000NaN0 Total: 1000PS[10] | Total: 10500NaN0[11] | |
| 540C | 2016 - 2021 | M838TE | 5400NaN0 @ 7500 rpm[12] | 5400NaN0 @ 3500 - 6500 rpm |
| 570S | 5700NaN0 @ 7400 rpm | 6000NaN0 @ 5000 - 6500 rpm | ||
| 600LT | 2018 - 2021 | 6000NaN0 @ 7500 rpm[13] | 6200NaN0 @ 5500 - 6500 rpm | |
| 620R | 2020 - 2021 | 6200NaN0 @ 7500 rpm | 6200NaN0 @ 5500 rpm |