Practical test: Four diesel utility vehicles in comparison In this utility vehicle line-up, we compare diesel-powered units from Kawasaki, Kubota, Massey Ferguson and John Deere. Next month it will be the turn of four petrol side-by-side models from Arctic Cat, Kawasaki, Polaris and Yamaha. Aim? To see if these machines really are up to intensive ag use, and if there is more to choose between them than just size, engine type and price