Specifications of Toyota Innova The Diesel engine is 2494 cc while the Petrol engine is 1998 cc . … Depending upon the variant and fuel type the Innova has a mileage of 11.4 to 12.99 kmpl. The Innova is a 8 seater and has length of 4585mm, width of 1760mm and a wheelbase of 2750mm.