At your budget of ₹25 lakh, the Toyota Innova HyCross is the best 7-8 seater petrol MPV available, especially since you can get a high-spec HyCross GX (O) variant at that price. However, the Innova Hycross petrol mileage is not very impressive. In our real-world test, it returned 6.9 km/l in the city and 12.4 km/l on the highway.
Since you plan to use it mainly on highways, we recommend considering the Toyota Innova Hycross Hybrid or choosing the Toyota Innova Crysta diesel to avoid high fuel expenses.