PSA TU engine

The PSA TU engine is a family of small four cylinder engines used in the Peugeot and Citroën range of cars. It was introduced in 1987 with the Citroën AX, replacing the X family, although it shared many components with its predecessor. The TU is available in either petrol or a non-turbo Diesel variants, the latter called TUD.

TU9

The TU9 was the entry-level version, used in a variety of cars including the Citroën AX, Saxo, Peugeot 205 and 106. It had a displacement of 954 cc, with a bore of 70 mm and a stroke of 62 mm. Power was initially 45 PS (33 kW), but it was increased to 50 PS (37 kW) in 1992, with the adoption of central fuel injection and a catalytic converter. Production was stopped in the Citroen Saxo and Peugeot 106 with the introduction of Euro III in 2001.

TU3

The TU3 has a displacement of 1360 cc, with a bore of 75 mm and a stroke of 77 mm. This engine has been one of the most used by the PSA Group, with applications in superminis, compacts and midsize cars, including a stint in competition use in the Citroën AX GTI Cup, held in many European countries throughout the early 1990s in both circuit racing and rallying.

In its early years, it was available with either a single or double barrel carburetor, with fuel injection introduced in 1990 for the AX GTI and 106 XSi, capable of delivering 100 PS (73.5 kW) at 6600 rpm. The carburated versions gave way to fuel injection in 1992, while the sports version was retired in 1996.

TUD

The TUD was the Diesel variant. It initially used the cylinder casings of the TU3 (and was thus called TUD3), but in 1992 displacement was increased to 1527 cc, with a bore of 77 mm and a stroke of 82 mm, the engine being renamed TUD5. It was available only with an injection pump (available in both Bosch and Lucas variants) and had no turbocharged versions. Besides a number of applications in the PSA Group's supermini models (AX, Saxo, 106), it was sold to other automakers who did not possess small Diesel engines. It was used in the Rover Metro from 1993 until the end of production in 1997. It also powered the diesel version of the second generation of the Nissan Micra in Europe, but this version was not sold in the UK.

ee also

* List of PSA engines

ources

* [http://www.autoweb-france.com/index.php?rub=22&cat=3 Guide des moteurs Peugeot Citroën] (in French)