It gives the Leon eHybrid, which also comes in estate form, an official WLTP electric range of between 36 and 40 miles, with just under four hours needed to fully recharge its cells using a SEAT Leon MPG & CO2 The mid-range 1.5-litre TSI petrol with 128bhp will return up to 51mpg, dropping to 48.6mpg for the 148bhp model. The smaller 1.0-litre petrol should top 50mpg in real-world Full tanks per 5000 miles - Vehicle FR 1.8 TSI ; Fuel tank size 50 L (11 gal) Max driving range - Fuel consumption per 10 km 0.6 L Fuel type Petrol (Gasoline) Full tanks per 5000 miles - Vehicle 1.0 TSI ; Fuel tank size 50 L (11 gal) Max driving range 969 km (602 miles) Fuel consumption per 10 km 0.5 L Fuel type Petrol (Gasoline) Full tanks per SEAT Leon review 2 Engines, performance and drive 3 MPG, CO2 and running costs 4 Interior, design and technology 5 Practicality, comfort and boot space 6 Reliability and safety 28 Overall Auto MPG means Miles per Gallon; this is the most commonly used unit for measuring fuel efficiency in the UK. Find out new terms in our Glossary. What is the average MPG (fuel economy) of a Seat Leon ? Seat Leon average fuel consumption is 52.7 MPG or 5.7 litres/100km and average CO2 output is 134.6 g/km based on 697 models. CO2 (carbon dioxide), mileage, fuel economy and other emissions data for Seat Leon cars. All Years. Seat Leon MPG 2000. 1 Verdict 2 Engines, performance and drive 3 MPG, CO2 and running costs 4 Interior, design and technology 5 Practicality, comfort and boot space 6 Reliability and safety 28 Overall Auto Express Miles per tank: 425 miles: Insurance group get an insurance quote? 24: Road tax: £180 per year: Dimensions (mm) Length 4282mm X Width 1816mm SEAT Leon Hatchback running costs and reliability. 2000 - 2005 (change model) Running costs rating: 3.5 out of 5 3.5. View 11 photos. Written by Parkers Published: 6 June 2019 Updated: 6 June 2019. Miles per pound (mpp) Reliable fuel consumption data for comparison purposes is not available for this model. Real MPG 49.4 Average Big improvements in quality and refinement over previous Leon. Great to drive with sharp handling. Good value. Shares same base as latest A3 and Golf. Only top models have fully independent rear suspension. Read the full SEAT Leon review Select engine for more Real MPG information: *Based on WLTP MPG values NuyKR.