The shifts on these cars are normally quite a bit harder than a similar year American car. However, it sounds like yours is shifting harder than intended. The first things to check are vacuum signal to the transmission, if your car has that, or adjustment of the throttle linkage to the transmission.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.