The Hart 415T is a

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direct ...

, 1.5-litre,

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

, inline four-cylinder

racing In sport, racing is a competition of speed, in which competitors try to complete a given task in the shortest amount of time. Typically this involves traversing some distance, but it can be any other task involving speed to reach a specific go ...

Internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal co ...

, designed, developed and tuned by

Brian Hart Brian Roger Hart (7 September 1936 – 5 January 2014) was a British racing driver and engineer with a background in the aviation industry. He is best known as the founder of Brian Hart Limited, a company that developed and built engines for mot ...

Hart Racing Engines Brian Hart Ltd., also known as Hart and Hart Racing Engines, was a motor racing engine manufacturer that participated in 157 Formula One Grands Prix, powering a total of 368 entries. Founded in 1969 by British engineer Brian Hart, Hart initial ...

, for use in

Formula One racing A Formula One Grand Prix is a sporting event which takes place over three days (usually Friday to Sunday), with a series of practice and qualifying sessions prior to the race on Sunday. Current regulations provide for two free practice sessions ...

and competition, between

1981 Events January * January 1 ** Greece enters the European Economic Community, predecessor of the European Union. ** Palau becomes a self-governing territory. * January 10 – Salvadoran Civil War: The FMLN launches its first major off ...

and

1986 The year 1986 was designated as the International Year of Peace by the United Nations. Events January * January 1 **Aruba gains increased autonomy from the Netherlands by separating from the Netherlands Antilles. **Spain and Portugal enter ...

. It initially developed about in 1981, but power levels later surged, eventually going on to produce about in qualifying trim and on maximum boost pressure, in 1985. The engines were used by

Toleman Toleman Motorsport was a Formula One constructor based in the UK. It was active between 1981 and 1985 and participated in 70 Grands Prix. Origins The Toleman company was formed in 1926 by Edward Toleman for the purpose of delivering Ford ...

RAM Ram, ram, or RAM may refer to: Animals * A male sheep * Ram cichlid, a freshwater tropical fish People * Ram (given name) * Ram (surname) * Ram (director) (Ramsubramaniam), an Indian Tamil film director * RAM (musician) (born 1974), Dutch ...

Spirit Spirit or spirits may refer to: Liquor and other volatile liquids * Spirits, a.k.a. liquor, distilled alcoholic drinks * Spirit or tincture, an extract of plant or animal material dissolved in ethanol * Volatile (especially flammable) liquids, ...

, and

Haas Lola Team Haas (USA) Ltd., sometimes called Beatrice Haas after its major sponsor, was an American Formula One team founded by Carl Haas in 1984 after an agreement with Beatrice Foods, a US consumer products conglomerate, which competed in the Worl ...

Applications

Toleman TG181 The Toleman TG181 is a Formula One car that was used in the 1981 Formula One season. It was also the first car used by Toleman in F1. It was a generally poor car, with its drivers, Derek Warwick and Brian Henton, only getting through qualifying ...

Toleman TG183 The Toleman TG183 was a Formula One racing car designed by Rory Byrne and built and raced by Toleman Motorsport. Design The TG183 was distinctive in that it had twin rear wings and front wing mounted radiators. Unfortunately the front wing c ...

Toleman TG184 The Toleman TG184 is a Formula One racing car designed by Rory Byrne and Pat Symonds and was used by Toleman Motorsport during the majority of the 1984 Formula One season. Engine Like its predecessor, the TG183B, the TG184 was powered by the ...

Toleman TG185 The Toleman TG185 was a Formula One racing car designed by Rory Byrne for use by the Toleman team in the 1985 Formula One World Championship. Background After a successful season, Toleman entered 1985 with Swede Stefan Johansson and John Wat ...

Spirit 101 The Spirit 101 was a Formula One car for the 1984 and 1985 Formula One seasons, The chassis was designed by Gordon Coppuck and Tim Wright. Development Spirit decided to continue in Formula One for 1984 with Hart turbocharged engines. Initially tw ...

* RAM 01 * RAM 02 *

Lola THL1 The Lola THL1 was a Formula One racing car designed by Neil Oatley for Team Haas (USA) Ltd. during four of the last five races of the 1985 Formula One season. The car used the , turbocharged Hart 415T Straight 4 engine. The Haas Lola team only ...

References

Straight-four engines Formula One engines {{F1-stub