McLaren has used various engines in different contexts. In Formula 1, McLaren used Mercedes-Benz-built engines for 20 continuous campaigns, then switched to Honda in 2015, and to Renault in 2018
. For their road cars, McLaren has used the M838T engine, a 3.8-litre twin- turbocharged V8, which was developed in collaboration with Ricardo plc
. Additionally, there are mentions of the M838T and M840T engines being rebuilt versions of the Nissan VRH engines
