City MPG: 20. city. Highway MPG: 25. highway. 4.5 gals/100 miles. Unofficial MPG Estimates Shared by Vehicle Owners. Owner MPG Estimates are not yet available for this vehicle. Jaguar Land Rover has two new options for it: the Range Rover Evoque and the Discovery Sport, both of them with the surname P300e. While the Evoque offers an electric-only range of 41 mi (66 km EPA Fuel Economy, combined/city/highway (mpg) 20 / 19 / 23. Fuel Tank. 2015 Land Rover Discovery Sport; Mechanical. Engine: 2.0L I4 Turbocharged. Transmission: 9-Speed ZF9HP50 Automatic. Oddly, upgrading from a P300 to a V6 diesel engine in a Discovery sets you back just £600. Clearly, everything costs a bit more in the world of Range Rover. Moving on to performance. This P300 Fuel Economy Claimed: 8.2 L/100km | Tested: 10.1 L/100km OVERVIEW Priced from $56,595 the Discovery Sport comes with three trim grade options and five engine choices. VrmT5fo.