What should my pressure be? Make Model Spec V8 4.7 ROADSTER.V8 ROADSTER.V8 ROADSTER. 4.7 V8 VANTAGE. 4.3 ROADSTERV8 VANTAGE. 4.7 SVANTAGE. V8 ROADSTERVANTAGE. V8 ROADSTER.VANTAGE. V8 ROADSTER. 19 OPTVANTAGE. V8 ROADSTER. 19 SPORT TYRESVANTAGE. V8 ROADSTER. LN400