I think there was a point where regulators said "diesel puts out lung damaging levels of pollutants killing X people a year. We shall either ban diesel engines ... or make manufacturers make diesel engines that don't pollute that badly"
So they set a safe level.
And no manufacturer has been able to achieve the technology to meet that level.
I know some manufacturers claim they can, but honestly that's like a cyclist claiming that they won the Tour De France without drugs. After so many cyclists have been caught (about half since 1990) it's really hard to take the drug free claim seriously - just as it's hard to take the "our diesel engine does it really honestly guv"
Renault probably did it
These guys probably did
I think there was a point where regulators said "diesel puts out lung damaging levels of pollutants killing X people a year. We shall either ban diesel engines ... or make manufacturers make diesel engines that don't pollute that badly"
So they set a safe level.
And no manufacturer has been able to achieve the technology to meet that level.
I know some manufacturers claim they can, but honestly that's like a cyclist claiming that they won the Tour De France without drugs. After so many cyclists have been caught (about half since 1990) it's really hard to take the drug free claim seriously - just as it's hard to take the "our diesel engine does it really honestly guv"