A quick check suggests 1286kg for the car, giving a ratio of 92%. For a 1.8 petrol engine, this will mean that you will struggle to maintain top safe speed, and won't be able to use 5th gear very often.
You'd probably be OK in Norfolk or Holland, but joking aside I think you need a meatier car. How about an ex-company fleet Mondeo with the TD engine? A few people on this site are very keen on it.
According to Parkers the guide price for a 2003/53 (just out of warranty) Mondy estate with the 130PS TD engine is