Lotus E23 Hybrid

Lotus E23 Hybrid
	Romain Grosjean driving the E23 Hybrid at the Malaysian Grand Prix
Category	Formula One
Constructor	Lotus
Designers	Nick Chester (Technical Director); Chris Cooney (Engineering Director); Martin Tolliday (Chief Designer); Simon Virrill (Deputy Chief Designer); Pierre Genon (Head of Performance Systems); Nicolas Hennel (Head of Aerodynamics); Jon Tomlinson (Chief Aerodynamicist)
Predecessor	Lotus E22
Successor	Renault R.S.16
Technical specifications
Engine	Mercedes PU106B Hybrid Turbo 1.6 L (98 cu in) V6 engine (90°), limited to 15,000 RPM in a mid-mounted, rear-wheel drive layout
Electric motor	Mercedes PU106B Hybrid Motor Generator Unit–Kinetic (MGU-K) Mercedes PU106B Hybrid Motor Generator Unit–Heat (MGU-H)
Transmission	Semi-automatic, sequential; 8 forward gears, 1 reverse gear
Power	930 hp (690 kW)
Weight	702 kg (1,548 lb)
Fuel	Petronas
Lubricants	Petronas
Tyres	Pirelli P Zero (dry), Cinturato (wet)
Competition history
Notable entrants	Lotus F1 Team
Notable drivers	08. Romain Grosjean; 13. Pastor Maldonado
Debut	2015 Australian Grand Prix
Last event	2015 Abu Dhabi Grand Prix

The Lotus E23 Hybrid is a Formula One racing car which Lotus used to compete in the 2015 Formula One season. The chassis was designed by Nick Chester, Chris Cooney, Martin Tolliday, Pierre Genon and Nicolas Hennel with Mercedes supplying the team's powertrain. It was driven by Romain Grosjean and Pastor Maldonado. Images of the 2015 car were released on 26 January 2015. The E23 Hybrid attained one podium with Grosjean at the 2015 Belgian Grand Prix, which would be the last with the Lotus name, and finished sixth in the Constructors' Championship.

At the time of its competitive debut at the 2015 Australian Grand Prix, where it scored a double retirement, the E23 Hybrid was the Enstone team's only car to use Mercedes engine after a 20-year period of racing with Renault based powerplants. The E23 Hybrid was also the first Enstone-based car not to use a Renault-based engine (including the period between 1998 and 2000 where the team used Playlife badged Renault-based Mecachrome/Supertec V10s) since the Ford-powered V8 powered Benetton B194 in 1994, as well as first full British team to utilize Petronas fuel and lubricants. The Lotus-Mercedes partnership was originally intended to last for six years (until 2020), but was terminated five years earlier as the team returned to Renault power unit after a single season and thus bought ill-fated Lotus stake from 2016 onwards and renamed back to Renault Sport Formula One Team. The Renault works partnership was terminated following the conclusion of the 2025 season following poor results with the power unit, and the Enstone based team, rebranded to Alpine since 2021, is set to return to customer Mercedes power units for the 2026 Formula One World Championship.