Following on from the bickering in here the other day about how flexible / inflexible the power delivery is on a TDI, I did a couple of indicated 30-70 roll on accelerations tests yesterday.
Same stretch of road, but two cars.
Car one: VW Passat TDI Sport 130 B5.5 - mapped to a tested on the rollers 173bhp with 273lb/ft of peak torque at around 2,250rpm.
Car two: Vauxhall Astra 1.7 CDTI SXI 100 - standard and untested on the rollers, so presumed to have the factory stated 100bhp and 177lb/ ft of peak torque @ 2,300rpm at its disposal.
Both cars had just the driver onboard, around half a tank of fuel, and were rolled on in third gear.
Run one - Passat: 7.8 seconds Run Two - Astra: 11.5 seconds
Both cars hit 70 without the need for any gear changes, but neither would have gone much quicker in this gear.
More relevant would be the Passat pre and after mapping, but given the laptop that had all the maps for this was dropped a while back and the HD corrupted, I think I'll just use the 'seat of the pants' feeling as the benchmark for this. :-)
Anyway... not too sad for a TDI barge I think, and proof you don't have to constantly stick stir in one of these to 'make progress'.
-- JackH