THERE is growing interest in turbo-diesel variants of compact SUVs but Nissan is the first mainstream player to take the plunge. After vowing last year that it would not sell a turbo-diesel X-Trail, the persistent queries by dealers and customers asking for the diesel changed Nissan’s thinking on the matter. The turbo-diesel - a Renault engine that is shared through Renault’s ‘alliance’ with Nissan - comes at a competitive $1000 premium over the petrol model.