There were 3.0-litre V6s and 5.0-litre unsupercharged V8s, but they were stopped. Now both have been replaced by a supercharged V6. Some drivers of diesel Jags have had DPF and EGR problems. Basically you have to use common sense. A DPF collects the soot of unburned hydrocarbons on start up, then burns them off later in the car's journey. If there's no 'later' it doesn't burn them off, clogs up and all sorts of problems start to occur.