It is a compact engine family of 1.4–1.6 L in displacement and includes most modern features such as gasoline direct injection and turbocharger.

On 29 September 2010, it was announced by BMW that the turbocharged 1.6-litre version of the Prince engine would be supplied from 2012 to Saab for use in forthcoming models, primarily the 9-3.

Engineering design was directed by BMW using their Valvetronic variable valve lift system on the intake side, flow-controlled oil pump, timing chain, single belt drive of all ancillary units, composite camshafts and cylinder head produced by lost-foam casting.

[10] The 1.4 L PSA EP3 and EP3C[11] is the smallest member of the Prince family with a stroke measuring 75 mm (2.95 in) and total capacity of 1,397 cc (1.4 L).

The naturally aspirated variant (EP6, EP6C[11]) has conventional fuel injection and lost-foam cast cylinder heads.

[12] Applications: The turbocharged 1.6 L unit adds gasoline direct injection and has special low-pressure die-cast heads.

It featured direct injection, twin-scroll turbocharger and Valvetronic variable valve lift.

It was first introduced in the Peugeot RCZ sport compact for the 2010 model year, where it generates 150 kW (204 PS).

The N14/N18 engine uses direct injection, a twin-scroll turbocharger and Valvetronic (variable valve lift).

There have been several cases of recalls and/or extended warranty due to failing HPFP (high pressure fuel pumps) in the Prince engine.

[19] In 2015 it was announced, on the Hong Kong Stock Exchange, that BMW had signed an IPR deal with XCE.

PSA will continue to develop the higher power models of the engine family, with future production planned for China with its JV partners DONFENG (DPCA) and Changan (CAPSA).