Hart 415T engine

The Hart 415T is a four-stroke, 1.5-litre, turbocharged, inline four-cylinder racing Internal combustion engine, designed, developed and tuned by Brian Hart of Hart Racing Engines, for use in Formula One racing and competition, between 1981 and 1986. It initially developed about 540 hp (400 kW) in 1981, but power levels later surged, eventually going on to produce about 825 hp (615 kW) in qualifying trim and on maximum boost pressure, in 1985. The engines were used by Toleman, RAM, Spirit, and Haas Lola.^[3][4][5]

Hart 415T
Overview
Manufacturer	Hart
Production	1981–1985
Layout
Configuration	L4
Displacement	1.5 L (91.5 cu in)
Cylinder bore	88 mm (3.5 in)
Piston stroke	61.55 mm (2.4 in)
Valvetrain	16-valve, DOHC, four-valves per cylinder
Compression ratio	6.7:1
Combustion
Turbocharger	KKK (later Holset)
Fuel system	Direct fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	540–825 hp (403–615 kW; 547–836 PS)^[1]
Torque output	380–480 lb⋅ft (515–651 N⋅m)^[2]
Dimensions
Dry weight	140 kg (310 lb)

Applications

• Toleman TG181
• Toleman TG183
• Toleman TG184
• Toleman TG185
• Spirit 101
• RAM 01
• RAM 02
• Lola THL1

References

1. "Engine Hart • STATS F1". www.statsf1.com. Retrieved 12 June 2022.
2. "Horsepower and Torque Calculator". Retrieved 12 June 2022.
3. "Hart 415T engine". Retrieved 12 June 2022.
4. "Hart 415T turbo F1 engine". Retrieved 12 June 2022.
5. "AYRTON SENNA'S FIRST F1 ENGINE- THE HART 415T. TINY ENGINE, TINY BUDGET, BIG TURBO, BIG POWER!". Retrieved 12 June 2022.