If you like your tractor to be 110kW/150hp and say Massey Ferguson on the bonnet, then you have plenty of choice from the red corner. Not only are there four- and six-cylinder models, but three transmissions are on offer — Dyna-4, Dyna-6 and Dyna-VT — with three levels of specification: Essential, Efficient and Exclusive. To see what difference a transmission and trim level can make we test the six-pot 7615 in all three flavours