1.4 118kW v 1.8 118kW

**Skoda** · 28-04-2012, 09:34 PM

Hi all,

Just wondering what people think about the 1.4 Twincharged 118kW enigines in the Jetta/golf compared to the 1.8TSI 118kW engines in the Passat/Octavia.

I was thinking that that the 1.4 might be smoother down low but might have to work harder and may not have the longevity.

Cheers

**gldgti** · 29-04-2012, 11:07 PM

in the sydney mod section, The_Hawk has just posted his dyno plet from today with a 1.4TSI.http://www.vwwatercooled.org.au/foru...a-68365-4.html

I would be fairly surprised if the 1.4 is smoother than the 1.8 - the nature of its makeup means that it requires boost to make torque, and that means a lot of technology has to work perfectly to get it to deliver smooth power.

As a comparison, heres a dyno plot (same shop, very similar weather) from my old mk3 turbo diesel -

quite similar numbers and rev-range to the 1.4, but see how my old diesel with greater displacement, only 2 valves per cylinder, sizeable turbocharger and mechanical fuel pump makes a much smoother torque curve because there are fewer feedback loops interacting with eachother (very simplistically). (just FIY, the 2 curves are so different because I increased fuelling after the first run)

Definately the 1.4 has to work harder... not necessarily is that a bad thing though.

**Diesel_vert** · 29-04-2012, 11:22 PM

Originally Posted by Skoda

I was thinking that that the 1.4 might be smoother down low but might have to work harder and may not have the longevity.

I don't think it matters on a practicable level, and if you intend to do the sorts of mileages where it will matter, you'd be better off with the TDI anyway.