The 2015 Lotus E23, also known as the Lotus E23 Hybrid, is a Formula One race car used by Lotus in the 2015 Formula One season, driven by Romain Grosjean and Pastor Maldonaldo; it appears in Forza Motorsport 6.
Replacing the Lotus E21 previously seen in Forza Motorsport 5, the E23 is the successor to the failed Lotus E22 and was succeeded by the Renault R.S.16, which itself is based on the E23. In 2017, the Renault R.S.17, which appears in Forza Motorsport 7, was released as the R.S.16's successor for the 2017 Formula One season.
The Lotus E23, being the only car by the Lotus racing team to use Mercedes-Benz-sourced engines after a 20-year partnership with Renault, uses a 1.6 liter Mercedes PU106B turbocharged hybrid V6 engine with the redline set to 15,000 rpm. The V6 is paired with a Mercedes PU106B Hybrid Motor Generator Unit, with a kinetic energy recovery system (KERS) and a waste heat recovery unit (WHRU). The total power output of the car comes out as 932 hp (695 kW) and the torque as 509 ft·lb (690 N·m).
The E23 was considered an improvement compared to the failed E22, which was plagued with reliability issues and struggling for competitiveness due to its underpowered and unreliable Renault power unit and its flawed chassis.
As a Formula One race car, much like the E21, the Lotus E23 specializes in handling, capable of taking on corners at a maximum cornering force of 2.95 lateral Gs, all while being well balanced in other performance aspects. It also has better acceleration than almost every single car in the game, capable of doing 0-100 mph (161 km/h) in 4 seconds, a milestone that only a car like the Hoonigan Ford "Hoonicorn" Mustang can hope to exceed. With its amazing braking performance, the E23 can get to low speeds under heavy braking very quickly. In terms of top speed, though, the E23 can be described as above-average, with 217 mph (349 km/h).
- The Lotus E23 was also the first Enstone-based car to not be powered by a Renault engine since the Ford-powered Benetton B194 in 1994.
- Completing a race on Circuit de Spa-Francorchamps in the Lotus E23 under rainy weather unlocks the Best of Spa achievement.
- The E23's in-game torque output is shown as 508 ft·lb (690 N·m).
- The Lotus E23 lacks the "Pirelli P Zero" tires in the game compared to real life.