 The Cummins engine was being specified more often from around 1988, and with this engine, the gearbox would usually be a ZF as opposed to the Leyland Hydracyclic.Volvo took over Leyland in 1988, and from 1989 the Tiger was offered with the Volvo THD100-series engine (as fitted in the best-selling B10M).The large majority of Volvo-engined Tigers went to Northern Ireland.