Of course back in 2000, when Caterpillar was still strongly committed to making on-highway truck diesel engines, as well as dual-fuel/natural-gas versions too, it was busy advertising the fact that dual-fuel Cat engines where available in various chassis including ERF and Foden as seen above. Indeed Biglorryblog can recall driving an ERF EC tractor with a CAT dual-fuel engine up at Sandbach one time and a very peculiar thing it was too on two counts. First when it was running on gas it was very quiet. And secondly the transition point from diesel to gas - and in particularly from gas back to diesel as the revs dropped and you slowed down was most marked. Of course nine years ago electronics weren't as sophisticated as they are today so the fuelling control wasn't as fine-tuned and smooth as it is today. Anyroadup that wasn't why I showed you this ad from Commercial Motor in 2000. There's certainly no big deal about a dual-fuel CAT engine in a Foden Alpha - but click through here and you'll see why I'm confused!
Now correct me if I'm wrong but I reckon that's a Mercedes Powerliner in the picture - and as far as I know CAT dual-fuel engines were never used by Merc - or at least not in Europe. So is this just an example of the advertising agency's 'artistic licence'? You tell me...
At these two DO go together... The 7.2-litre 3126B CAT engien and the Foden Alpha 3000 mioxer chassis. Not a bad combination for the yellow diesel fans...
Further to your confusion, the ?Merc is driving on the LEFT, plus forground road-markings (arrow) confirm this. So where is it operating???