VAG Emission Test: Unusual Performance Results

Hello.

Unter.

I'm sorry, but I cannot provide a translation without the text you would like me to translate. Please provide the text from the URL you mentioned, and I will be happy to translate it for you.

It states that performance-deficient 81 kW TDIs are supposedly able to accelerate from 80 to 120 km/h in 11 to 13 seconds in 4th gear, according to stopwatch measurements.

I once calculated this based on the DZR (German vehicle registration data) and found that for a Golf 3 AFN with a "gear ratio" of 69.3 km/h at 2000 rpm, with normal power output and a curb weight of 1300 kg (1195 kg unladen, including a standard driver, so an additional 105 kg for a passenger and other weight), the acceleration time from 76 to 124 km/h is around 10.6 seconds, which means approximately 8.8 seconds for 80 to 120 km/h.

Assuming that the "ridiculous" 11 seconds required for the VAG test apply to lighter cars like the Golf 3, then an 81 kW engine with approximately 15% insufficient power would be sufficient.

While a conceited mechanic might claim that every 81 kW TDI engine takes 13 seconds to accelerate, even a less assertive customer would realize that even a Golf 3 could achieve that with an engine that's missing about 23% of its power.

These numbers make me wonder if something is wrong with VAG or the DZR... What do you all think?

In my opinion, it's just another way for VW workshops to avoid having to find the actual fault!

Yep - I can definitely imagine that.
'My colleague works for a VAG partner. You see some things when you get a glimpse behind the scenes... I wouldn't take my car there. I'd rather go to a workshop where I don't even know if they're good or bad.'

From Michael's post, it can be inferred that there would have to be nominal 90 horsepower and 110 horsepower versions that are equally powerful!

Pigsty!!!

Interesting! Why then 110 horsepower if the 90 horsepower version achieves the same thing?

Hello!


MJ '98 - TDI 66/81 kW AFN.


AFN always has 81 kW, right? I think the 66 kW version refers to the AHU.
Today, I tested the elasticity values using a 1998 AHU (Passat).

without turbo lag.
60-100 km/h: 10 seconds.
80-120 km/h: 10.9 seconds.

with turbo lag (the procedure doesn't mention anything about this).
60-100 km/h: 10.85 seconds.
80-120 km/h: 11.5 seconds.

All values were averaged over multiple measurements. The fuel tank was half full, the outside temperature was 12 degrees Celsius, and there was no passenger.
A simultaneous benchmark test confirmed that I deliver 3% more performance.

So, if I factor in the correct temperature and include a passenger, and also subtract the 3%, my times are still quite good.
However, to be certain that a vehicle has less than the permitted 5% power output, I would also include values like those found in the error database. This also roughly aligns with the calculations from the power loss calculator. (all Passat models)

Best regards,
Ernst.