You got a question or is this a gripe , observation on a vehicle you have ? Never heard that one before " sounds like its got a 3.0ltr engine in it " Most 3 litre engines are usually excellent , certainly the ones I've had and driven
A lot of the 3 cylinder engines nowadays sound that way . Obviously a completely different gear ratio compared to your 1.5 diesel .As an example , even the Ford Fiesta 1.0 3cyl Eco boost cars benefit from a much needed 6th gear . Have to live with it or get shot of it .