The Economist has a glowing overview of new diesel engines for cars:
NOT to belittle the success Tesla Motors has had with its Model S luxury electric car — outselling its petrol-powered equivalents since being launched last year — the prospects for battery-powered vehicles generally may never shine quite as bright again. Babbage believes their day in the sun is about to be eclipsed by, wait for it, the diesel engine.
Surely not that dirty, noisy, smelly, lumbering lump of a motor that was difficult to start in the winter? Certainly not. A whole new generation of sprightly diesels — developed over the past few years — bear no resemblance to your father’s clattering, oil-burner of an Oldsmobile. It is no exaggeration to say that, with its reputation for unreliability and anaemic performance, the Olds 4.3-litre diesel from the late 1970s single-handedly destroyed the reputation of diesel engines in America for decades to come. Quite possibly, it also contributed to Oldsmobile’s own demise.
Later this year, Americans will get their first chance to experience what a really advanced diesel is like — and why Europeans opt for diesels over hybrids, plug-in electrics and even petrol-powered cars. The leader of the new pack is the Mazda 6, completely redesigned for 2014, with the choice of either a 2.5-litre four-cylinder petrol engine or a 2.2-litre turbo-charged diesel. The diesel has 30% better fuel economy and provides oodles more pulling power. Good as the petrol version is, motorists who choose it over the diesel will miss out on a lot.
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With its old 1.4-litre diesel engine, the Volkswagen Polo still holds the record for being the most frugal non-electric car in Britain and the rest of Europe — with a fuel economy on the combined cycle of just 3.8 litres/100km (equivalent to 61.9 miles per US gallon). The Toyota Prius hybrid? A lowly twentieth on the league table of the most economical fuel-sippers, with 4.2 litres/100km, along with higher emissions of carbon dioxide. The 19 cars having better fuel economy than the Prius hybrid are all clean diesels.
Babbage fully expects the new generation of clean, low-compression diesels to raise the fuel-economy bar by a further 20% or more. That will put diesels on much the same footing — on an equivalent miles-per-gallon basis — as many of the electric vehicles available today. Their big advantage will be that they will come with none of the range anxiety and recharging difficulties to worry about. Roll on the day.
