TD5 all day long. More powerful, smoother, quieter. Tuneable and reliable if maintained properly. Relatively simple electronics compared to other modern diesels. Once drove a 300 Tdi Disco and thought I was towing a house it was so sluggish - even with a tweaked pump. I've owned five TD5 engines in various forms over the years. My latest 90 CSW was mapped by Gary at Alive and pulls like a train and drives like a car.