London bus engines - are they turbines?
September 2, 2011 4:17 AM Subscribe
I've noticed that most newish London busses don't sound like a normal diesel engine: they sound more like some kind of turbine. What engines do they use and why?
posted by richb to science & nature (15 answers total) 2 users marked this as a favorite
Older London busses sound like normal diesels, just the same as any large vehicle or lorry. All the newer ones make a very loud roaring, whining, whirring, whoosing noise, almost as if they had a jet engine or some sort of turbine based engine. Why is that? What kind of engine do they use? Why don't new lorries make the same noise?