In relation to the Vauxhall Vectra tyre options at Tyres.co.uk, there is the Michelin Primacy 4+ and Goodyear EfficientGrip Performance 2 205/55 R16 91V available for the 2007 Vectra C 1.8 with the standard 16-inch fitment. Please check the registration, tank-flap label and current tyres prior to ordering.
Tyre information for Vauxhall Vectras can be found on the adhesive placard located on the inside of the fuel-filler flap on the vehicle's right rear. The placard contains information on approved tyres and their corresponding pressure ratings. For confirmation on your version, check the tyre sidewall and use the registration.
Typically, Vauxhall Vectra vehicles do not need all four tyres changed: do so as an axle pair, with the same size, design, manufacturer, and tread pattern on that axle. The 1995-2008 Vectra series is front-wheel drive, so no model has a matching requirement for four-wheel drive; a new pair should be fitted to the rear axle in line with UK safety guidance.