BSFC turbocharged vehicles

[teoman]

What year was your passat? And do they have wideband o2 sensors or narrowmand?

I have the 1.8t 2011. Cruising at 80 kph I got 46 mpg.

[oldtamiyaphile]

Originally Posted by NHB

Downsized engines not going anywhere. Only small diesels have problems with their NOx emissions. The miller cycle has increased the size of few engines, but at the same time we have much more engines which are getting smaller.

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.

[slurp812]

Sounds like there is a sweet spot..

[NHB]

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.

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.

[cRiPpLe_rOoStEr]

Originally Posted by NHB

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.

At least here in Brazil the 1.0TSI already replaced the 1.6L naturally-aspirated in the Golf, but in lower-end models those ancient concerns about the impact of turbocharging in the fuel-efficiency and durability of the engines is still widespread, and the lack of suitable CNG conversion kits for direct-injection engines still leading the 1.6L to be prefered by some operators.

[oldtamiyaphile]

The age of engine downsizing is over, says Volkswagen

"The trend of downsizing is over,"

[teoman]

It sounded like they could not bothered to solve the issues...