PSA XUD

The PSA XUD is a Diesel engine designed and built by PSA - Peugeot and Citroën. It is an Indirect Injection (IDI) engine, that uses a version of the Ricardo Consulting Engineers Ricardo Comet V prechamber cylinder head design. The engine comes in 1,769 cc 1.8 N/A, 1.8 Turbo, 1,905 cc 1.9 N/A, 1.9 Turbo, 2.1 12 valve N/A and Turbo and was the predecessor to the HDI range of engines. Early HDi Engines were a PSA design, later 16 valve engines were jointly developed with Ford.

Design

The XUD was available with either SOHC 8-valve or 12-valve heads. It was mainly applied transversally in front wheel drive vehicles, tilted by 30°. However, some applications in non-PSA vehicles had the engine installed longitudinally, with rear-wheel drive. The XUD is built in Citroën's plant in Trémery, near Metz.

Displacement ranges between 1,769 and 2,138 cc, and all XU diesel engines have a stroke of either 88 mm (3.5 in) or 92 mm (3.6 in). The former was shared with the XU9. Bore sizes range from 80 mm (3.1 in) to 86 mm (3.4 in), some of which are shared with other XU engines.