On Tyres.co.uk, Volvo S70 T5 options include the Michelin Primacy 5 and Bridgestone Turanza 6, which are 205 / 55 R16 91W and work with Volvo's 16-inch factory-fitted wheels. That said, different factory-fitted wheels have been used on different variants of the S70 Volvo, as such, prior to purchasing check the tyre information sticker to see the size, load index, and speed rating.
The information on tyre sizes for the Volvo S70 is available on the tyre information sticker on the rear edge of the inner door on the front right side of the vehicle. To view the factory fitted tyre sizes, load index and the recommended cold tyre pressure, open the driver's side door. Ignore the general tyre size guides and use the label to check the specifications.
The S70 Volvo does not need the replacement of all four tyres. Since it was sold with front-wheel drive, there is no S70 variant that needs a matching set of tyres for both axles. If possible, replace tyres in axle pairs and maintain matching construction and size for each pair. If new tyres are fitted to one axle, fit them on the rear axle.