Petrol
1. Mazda F8 (1800cc), Mazda FE(2000cc) are bolt fitting engines for Kia Sportage, just put out old original diesel and put in F8/FE. Problem with these engines is proper configuration of ecu if you are using efi version. other wise bilal gunj is selling them and recommending mehran's carburetor to be fitted. expected fuel avg 10/11 km per liter
- 3s is petrol engine by Toyota, widely used in Kia Sportage, need modifications fuel avg 9/10 km per liter
Diesel
1. Mazda RF, 2000cc original engine, (in my sporty), working strongly, long life, less maintenance, parts are cheap and easily available from pickup/loader spare part shops. fuel avg 11/12. (there are 2 oil filters to e replaced on each oil change. people miss one filter, resulting in shorter engine life)
- Toyota 2c, 2000 cc, fuel avg 13/14 per liter
- Toyota 3c even more better average and power