Valtra T-series tractors: Valtra introduced its six-cyl T-series tractors in the second half of 2002, initially just in highspec ‘electronic’ form. But not for long. As the old square-profile Valtra 8000 tractors were phased out, the first ‘electronic’ T tractors adopted the Advance tag and were joined by lower spec T versions bearing the familiar names of Classic and HiTech. James de Havilland reports