Question Author
I was already aware of the Parkers website, but thanks for suggesting it anyway. Becasue the insurance groups are made of a number of factors, I am only interested in power.
So thanks for the Seat 1.4/1.7 suggestion. I was looking through P/R/S reg cars and found 1.8 Peugeot 306, and Vauxhall Astra 1.6's to be also in insurance group 5. In group 7, found a 1.8 Astra 16v Sport (R reg) with AC & Renault Laguna 1.8 RT Sport (P reg).
Thanks for answers, Alex.