Mark, car diesels don't have a governer, they just reach the limit of fuel atomisation.
You're showing your age now!!
My engine is very familiar with its rev limit (has to be, those bloody particulate filters don't work if you drive like 'flat cap'), but it still chucks smoke out like a good 'un with other fuels. The V-Power fuel gives almost no smoke. So maybe pants to you, but a guranteed MOT pass for me!!!
Can't believe it, but where I filled up two days ago, price has gone up again by a penny!