Volvo likes to match up power outputs of it's cars, so the T4 petrol has the same 190 horsepower that the D4 diesel has. It's delivered in a different way with the petrol being much smoother and quieter and higher revving, with not quite as much mid range torque as the diesel but more top end shove. Fuel economy can't quite match that of the diesel at 42mpg whereas the 0-60 time of 8.7 seconds and the top speed of 130 mph are broadly similar. If you're a higher mileage user doing 15-20,000 miles a year then the improved economy of the diesel may serve you better but for average users doing 10-12k miles a year then the negative publicity regarding diesel has meant that petrol cars are generally a safer bet come resale time. The entire selection of new Volvo S90 T4 Petrol deals are shown above, just select the new car specification you're after to see our best prices, deals and special offers from our authorised UK main dealers on a new 2020 S90 T4 Petrol for sale in the UK, either as a cash deal or with a low rate PCP finance quote.