Ian the 960 had the option from 1994 ('95 Model Year, M registration letter)
of the 2.5 Litre six-cylinder engine (same as 3 Litre but smaller) with
either AW30-40 auto or M90 manual gearbox. It was available in same trim
levels as the 3 Litre car, namely 960S, 960SE, 960GLE and 960CD. I have no
information on the later cars or the S/V90s which were produced during
1997/8 but they were very similar to the earlier cars.
The 2.3 Litre turbo version of the 960 was only UK available for 1991 and
1992 Model Years.
All the best, Peter.
700/900/90 Register Keeper,
Volvo Owners Club (UK).