I'm looking for an R56 FJCW. My budget leads me to the 2007-2009 era cars. Initially, I did some research and thought I had my head around the engine changes that were introduced around the time, but now I'm not so sure! :-)
iirc there was a change to engine design/performance around the 2007/8 time, resulting in slightly higher HP and possibly even fuel economy from the newer engine? If true then does anyone know what year I should go for to ensure I have the newer one, please? And ideally what to look for on a registration document to confirm it.
Prince is the codename for a family of automobile straight-4 engines developed by PSA Peugeot CitroŽn and BMW. It is a compact engine family of 1.4Ė1.6 L in displacement and includes most modern features including gasoline direct injection, turbocharging, BMW VANOS and variable valve timing.
The BMW versions of the Prince engine are known as the N13 and the Mini versions are known as the N14 and N18. It replaced the Tritec engine family in the Mini and was first introduced in 2006 for MINI. Later in 2011 also for BMW models F20 116i and 118i. This was the first longitudinal engine mount option for Prince engine.
PSA has started to use the Prince family in 2006 to replace a part of their TU family (the other part being replaced by the EB engine) ó the Peugeot 207 being the first car to receive it.
The engine's components are produced by PSA at their Douvrin, France, facility, with MINI and BMW engine assembly at Hams Hall in Warwickshire, UK. The co-operation was announced on 23 July 2002 with the first engines produced in 2006. The Prince engine project is not related to the Prince Motor Company.
In late 2006, an extension of the cooperation between the two groups was announced, promising new four-cylinder engines, without further details.
On 29 September 2010, it was announced by BMW that the 1.6Turbo version of the Prince engine would be supplied from 2012 to Saab for use in forthcoming models, primarily the 9-3. However with the closure of SAAB supply never started.
At the Geneva Auto Show 2011, Saab unveiled their latest concept vehicle Saab PhoeniX with BMW Prince Engine 1.6T 200 bhp (149 kW; 203 PS); 
On 25 June 2014 1.6-litre turbo Prince engine won its eighth consecutive International Engine of the Year Award in the 1.4 to 1.8-litre category. In 2014 the Prince engine beat, among others,the new BMW B38 engine which is replacing the Prince engine in the Mini and BMW lineups.
the better engines came around 2010 with the turbo engines N18 a much better more power engine