Quote:
Originally Posted by oldtamiyaphile
BMW's 1.5 is more economical the otherwise identical 1.2.
VW Golf is dropping the 1.4 in favor of a more economical 1.5.
1.5's in this segment aren't what I'd call downsized, but the smaller engines are being dropped. If going smaller was the right way to get, the new engine would be a 1.3.
It will be interesting to see what come out of RDE.
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Data sheet from Mini's web site says, that the 1.2 liter engine has lower compression ratio and it reaches peak torque at higher revs then the bigger 1.5. Bore/stroke ratio is also different. BMW has replaced the old 4-cyliner 1.4-1.6 Prince engines with 3-cylinder 1.2-1.5 engines. This is downsizing.
VW's 1.4 TSI liter will be replaced by 1.5 liter unit and there are two reasons for the increase in size. The new engine uses miller cycle, which makes the intake event shorter. Bigger displacement compensates this. The bigger 1.5 liter unit also fits perfectly to tax limits in China. At the same time VW is making their highly efficient 1.0 liter unit much more popular. It will replace old 1.0, 1.2 and 1,6 liter engines. The 1.0 unit is not going be dropped. Quite the contrary, the 1.0 unit is getting much more popular.