If I go back a few years (oh alright, decades ), the best sounding engine was any one that would start at 4.00am on a winter’s morning
Sarcasm aside, the best sounding is hard - all the good ones have their own individual sound. Distinctive is easier. Perhaps it’s a sign of how long I’ve been out of the transport game, perhaps not, but there was a time I could pick a wagon just by hearing it coming down the road - with a few exceptions I couldn’t do that now. I could pick an F86 from an F7 from an F88 from an F10 (but not and F10 from an F12), a 111 (easy), a DAF2800/3300 from a 2100/2300/2500, a Rolls from a ■■■■■■■■ a Gardner from anything, a Maggie from anything and so on.
Anyways, a short list in no particular order:
Maggie Deutz V8 (a favourite even now)
Rootes TS3 knocker (I can even remember as a kid in the early 60s hearing Slate and Tile Fodens with these things in them)
Scania 141 V8
Scania 112 with a set of decent pipes listening to the turbo lag on the over-run
CAT V8 + jake brake
F88/ F89
V10 Mercedes
I’m sure I’ll think of more later. Have an earful of this, a 1957 Commer knocker restored and owned by a bloke in Sydney, it’s just… just…f’kin mad
youtube.com/watch?v=BmM-soQnQrc
Cars I won’t go into, if I get started on great sounding bikes we’ll be here all day.
Buses are kind of ball-park (aren’t they?)** . No matter what pigs they may have been to drive, my favourites to listen to (and that I remember well) were/ are the original Mk1 Leyland Thrashionals with the fixed head Leyland 510, any Leyland 0.680 engined Bristol RE (an exhaust note that breaks windows at 500 yards combined with the whine of the Bristol final drive) and Gardner 6LXB engined Bristol VRs with a loud exhaust note.
youtube can supply lotsa National thrash and Bristol REs too. But the best RE on youtube (turn your bass UP!) IMO is:
youtube.com/watch?v=j-SA09eBz_g
Why the best? Because this 40 year old RE is still in service.
A good Bristol VR sound:
youtube.com/watch?v=OKq4hY3b2kE
** No? Oh well, it was nice knowing y’all