Tyres.co.uk lists the Toyo Open Country U/T and Pirelli Scorpion All Terrain Plus for the Range Rover Classic in 235/70 R16 for most factory fitted sizes. The Toyo is designed for more on-road scenarios and the Pirelli is an all-terrain tyre. Make sure you double check the size and load index and check the speed rating before placing your order.
In order to find the tyre size on a Land Rover Range Rover Classic, you will need to check the tyre pressure and identification label on the lock of the driver's side door. You are able to check the size by leaving the door open. The size can also be found on the sidewall of each tyre. There are variations in specifications of factory fitted wheels and tyres, so take a careful look at the labels to see if they vary from the specifications in your owner’s manual and the registration documents.
Provided the same size, same make, same ply rating, and same tread pattern is maintained, a pair will be acceptable. The Range Rover Classic needs four tyres, so a match across all four will be required. Models that have a Borg-Warner viscous coupling need all tyres closely matched. In the interest of safety, as per UK recommendations, a new pair should be fitted to the rear axle. If matching across all four is not possible, then all must be changed.