The GMA is a 4.0-litre,

naturally aspirated A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a turboc ...

V12 engine A V12 engine is a twelve-Cylinder (engine), cylinder Internal combustion engine#Reciprocating engines, piston engine where two banks of six cylinders are arranged in a V engine, V configuration around a common crankshaft. V12 engines are more c ...

, commissioned by

Gordon Murray Ian Gordon Murray (born 18 June 1946), is a successful and influential South African-British former (Formula One) race-car designer, renowned firstly as lead designer for both the Brabham and McLaren Formula 1 racing teams, during 196 ...

, and developed and produced by

Cosworth Cosworth is a British automotive engineering company founded in London in 1958, specialising in high-performance internal combustion engines, powertrain, and electronics for auto racing, automobile racing (motorsport) and mainstream Automotiv ...

for the Gordon Murray Automotive T.50 and T.33

sports car A sports car is a type of automobile that is designed with an emphasis on dynamic performance, such as Automobile handling, handling, acceleration, top speed, the thrill of driving, and Auto racing, racing capability. Sports cars originated in ...

s. The road-going engine is rated at at 11,500 rpm, with a max torque figure of at 9,000 rpm, and a maximum rpm redline of 12,100 rpm making it the highest revving road car engine ever produced. The engine is also more powerful than the

S70/2 S7 or S-7 may refer to: Electronics and software * Acer Aspire S7, a laptop * Samsung Galaxy S7, a smartphone * Samsung Galaxy Tab S7, a tablet computer * , an automation system based on Programmable Logic Controller from Siemens, successor t ...

V12 engine used in the

McLaren F1 The McLaren F1 is a sports car that was the first Motor vehicle type approval, type approved road-going sportscar manufactured by British Formula One team McLaren. It was the last road-legal, series-produced sportscar to win the 24 Hours of Le ...

Background

For its first vehicle, GMA enlisted trusted engine designer

, which had worked alongside Murray in the past, to design and manufacture a brand new V12 to power the T.50. Cosworth's commission to GMA replicated the goals set for the renowned McLaren F1: produce a lightweight engine with the quickest response time of any engine ever designed for road use. It also required great sound quality and attractive aesthetics. The goal was to keep the engine displacement as small as possible in order to deliver unrivalled power-to-weight for a vehicle weighing under 1,000 kg. The streamlined 3.9-litre V12 delivered was free of both coverings and belt-driven accessories and became the highest-revving engine ever made for a production car. The T.50’s version of the GMA V12 engine generates high-end power of 663 PS (654 hp) at 11,500 rpm. The maximum torque figure of 467 Nm (344 ft-lb) is produced at 9,000 rpm, with 71% of available torque produced as low as 2,500 rpm. Its

block Block or blocked may refer to: Arts, entertainment and media Broadcasting * Block programming, the result of a programming strategy in broadcasting * W242BX, a radio station licensed to Greenville, South Carolina, United States known as ''96.3 ...

is constructed from a high-strength

aluminium Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...

alloy, the steel

crankshaft A crankshaft is a mechanical component used in a reciprocating engine, piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating Shaft (mechanical engineering), shaft containing one or more crankpins, ...

weighs only 13 kg (29 lb), the pistons are made from a

Metal matrix composite In materials science, a metal matrix composite (MMC) is a composite material with fibers or particles dispersed in a metallic matrix, such as copper, aluminum, or steel. The secondary phase is typically a ceramic (such as alumina or silicon carb ...

(MMC), and the

connecting rod A connecting rod, also called a 'con rod', is the part of a reciprocating engine, piston engine which connects the piston to the crankshaft. Together with the crank (mechanism), crank, the connecting rod converts the reciprocating motion of the p ...

s and

valves A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, ...

are made of

titanium Titanium is a chemical element; it has symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in ...

(as is the

clutch A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does th ...

housing). At , the engine is the lightest ever for a supercar, and its output of 166 PS per litre is the highest of any naturally-aspirated road car engine.

Variants

A more powerful, track-only, racing version of the GMA engine will also be produced, and is set to be used in a racing-focused variant of the T.50, called the Gordon Murray Automotive T.50s Niki Lauda. Power and torque figures for the T.50s have been substantially boosted over the standard road car's engine; now producing at 11,500 rpm, and at 9,000 rpm, an increase of and over the standard car. Output is raised to at 11,500 rpm, when fitted with a

ram-air intake A ram-air intake is an intake design which uses the dynamic air pressure created by vehicle motion, or ram pressure, to increase the static air pressure inside of the intake manifold on an internal combustion engine, thus allowing a greater mass ...

. The T.50s also now generates about per litre. The racing version of the GMA engine also has had various tweaks, including removing the

catalytic converter A catalytic converter part is an vehicle emissions control, exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalysis, catalyzing a redox ...

s from the

exhaust system An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall syste ...

, narrower

inconel Inconel is a nickel-chromium-based superalloy often utilized in extreme environments where components are subjected to high temperature, pressure or Mechanical load, mechanical loads. Inconel alloys are oxidation- and corrosion-resistant. When he ...

walls, and smaller

muffler A muffler (North American and Australian English) or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust syst ...

s, now weighing . It's lighter than the T.50's engine, making it the lightest V12 engine ever.

Engine specifications

*Engine type: V12 *Capacity: *V angle (degrees): 65° *Aspiration:

Naturally-aspirated A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a turboc ...

*Bore: *Stroke: *Compression ratio: 14:1 *Maximum power output: at 10,500–11,500 rpm *Maximum torque output: at 9,000 rpm *Flexibility: 71–75% of maximum torque at 2,500 rpm *Maximum rpm: 12,100

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to hertz. Standards ISO 80000-3:2019 def ...

*Valvetrain: double overhead camshafts, inclined axis, 4 valves per cylinder –

variable valve timing Variable valve timing (VVT) is the process of altering the timing of a Poppet valve, valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combina ...

on inlet /

exhaust Exhaust, exhaustive, or exhaustion may refer to: Law * Exhaustion of intellectual property rights, limits to intellectual property rights in patent and copyright law ** Exhaustion doctrine, in patent law ** Exhaustion doctrine under U.S. law, i ...

*Induction system: RAM induction airbox – 4 throttle bodies – Direct Path Induction Sound *Exhaust system:

Inconel Inconel is a nickel-chromium-based superalloy often utilized in extreme environments where components are subjected to high temperature, pressure or Mechanical load, mechanical loads. Inconel alloys are oxidation- and corrosion-resistant. When he ...

and

Titanium Titanium is a chemical element; it has symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in ...

*Lubrication system:

dry sump A dry sump system is a method to manage the lubricating motor oil in Four-stroke engine, four-stroke and large Two-stroke engine, two-stroke Reciprocating engine, reciprocating internal combustion engines. The dry sump system uses two or more o ...

*Cooling system:

water-cooled Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...

– twin-

front

radiator A radiator is a heat exchanger used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in cars, buildings, and electronics. A radiator is always a ...

s *Oil cooling system: Single aluminium rear radiator *Ignition system: 12 individual coils, 12-

volt The volt (symbol: V) is the unit of electric potential, Voltage#Galvani potential vs. electrochemical potential, electric potential difference (voltage), and electromotive force in the International System of Units, International System of Uni ...

*Exhaust emission control: 4

s with

lambda sensor An oxygen sensor is an electronic component that detects the concentration of oxygen molecules in the air or a gas matrix such as in a combustion engine exhaust gas. For automotive applications, an oxygen sensor is referred to as a lambda senso ...

s and

secondary air injection Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller secondary combustion of exhaust gases. Development ...

*Engine block: Aluminium alloy *Cylinder heads: Aluminium alloy *Connecting rods: Titanium *Valves: Titanium *Pistons: Metal matrix composite *Total engine weight: *Engine mounting: Semi-structural-inclined axis shear mounting (IASM) *Power density: 166 PS per litre

Applications

* Gordon Murray Automotive T.50 * Gordon Murray Automotive T.33

References

{{Reflist, refs= {{cite web , author= , date=31 March 2023 , title=GMA T.50 enters production – Gordon Murray signs off 12,100rpm supercar , url=https://www.evo.co.uk/news/22743/gordon-murray-automotive-t50-revealed-the-real-mclaren-f1-successor , website=evo.co.uk , location= , publisher= , access-date= {{cite web , author= , date= , title=T.50 , url=https://www.gordonmurrayautomotive.com/automotive/t50 , website=gordonmurrayautomotive.com , location= , publisher= , access-date= {{cite web , url=https://www.cosworth.com/case_studies/t-50/ , title=Case Study: T.50 , date=2020-09-24 , publisher=Cosworth , access-date=2025-06-22 , archive-url=https://web.archive.org/web/20230609035402/https://www.cosworth.com/case_studies/t-50/ , archive-date=2023-06-09 {{cite web , author= , date=2021-02-26 , title=Gordon Murray Automotive: T.50s Niki Lauda , url=https://www.cosworth.com/news/gordon-murray-automotive-t50s-niki-lauda/ , website=cosworth.com , location= , publisher= , access-date= {{cite web , last=Petrány , first=Máté , date=22 February 2021 , title=Gordon Murray's T.50s Niki Lauda Is a Modern F1 GTR Successor That Weighs 1,878 Pounds , url=https://www.thedrive.com/news/39379/gordon-murrays-t-50s-niki-lauda-is-a-modern-f1-gtr-successor-that-weighs-1878-pounds , website=thedrive.com , location= , publisher= , access-date= {{cite web , author= , date= , title=T.50S , url=https://www.gordonmurrayautomotive.com/automotive/t50s , website=gordonmurrayautomotive.com , location= , publisher= , access-date= Cosworth V12 engines