Excuse the dramatic title, but I was quite happily surprised with the 8th gear acceleration results I captured...
Recently I logged both a Q5 3.0T and my TDI on the same strip of flat, straight road, in comparable temperature, etc. Every test I did 2 passes in each car to ensure results were repeatable.
I did a handful of other comparisons (ie 0-60) which were all much closer than this one. I'll post about all of the results later, but wanted to get this one up now
This comparison was for the cars to be in M8, cruise control at 60mph and fully accelerate without kickdown, to 80 mph.
As you can see, the 3.0T makes it to 80 in an average of 15.1 seconds, while the TDI only takes 9.4 seconds!
* I actually computed to 79mph since one of the runs didn't make it to 80. 79 was the highest common across all runs.
You can also note from the RPM graph data how similar the gearing is. They both have the same tranny, but the 3.0T has a 3.204 final drive, while the TDI has a 3.076. At 60mph, this results in 1484 RPM for 3.0T and 1425 RPM for TDI, hardly seems worth there being a different part. The largest difference would be about 175 RPMs at the highest RPM they have in common (~4500).
Bottom line, this resulting RPM range of 1500-2000 RPMs clearly favored the torque of the TDI
Wow, talk about "cherry-picking" data. Your test is in the proverbial "wheel house" of diesel strength.
I think I made both of those points clear in my post. Not trying to hide that by any means. I have 3 other comparisons I'll post as well. In all of those (or at least 2.5), the 3.0T outperformed the TDI. However the differences were much more subtle in comparison to this one, which led me to post this first. And because I have a TDI :P
I did not chose this test based on RPM (to favor the TDI) - I chose it based on a reasonable speed range (60-80mph) consistent with what some magazines test (I think 50-70) in top gear. In general, I'm not a fan of a top gear test as it favors the guy with the crappier-economy-geared vehicle. In this case, they have the same tranny and near identical final drives, so that wasn't such an issue. Also, this test came in part out of the video that was posted that claimed the TDI was "flat footed" on highway accel, for which there was some inference or we created one in that thread which tied to top gear.
So yes I would have expected the TDI to outperform the 3.0T in this test, but after having driven both of them daily, I wasn't expecting the difference to be this great. All around, they seemed to perform quite similarly.
The other tests I'll post are (1-3):
1.) 0-100 in "S", ESP off, foot to floor (w/kickdown)
> Scenario: Fastest off the line (eg 0-60)
2.) 45-100 in "S", full throttle (w kickdown)
> Scenario: Similar to a common B5S4 testing range. Fastest possible from that starting point. Street-racer type comparison.
3.) 60-100 in "D", full throttle (w/o kickdown)
> Scenario: Highway passing; quickest in civilized (no "S" or kickdown) manner (ie wife/family in car)
4.) 60-80 in "M8", full throttle (w/o kickdown)
> Scenario: Top gear comparison.
Each car gets to pick their own gears for those tests so nobody can complain
'12 Audi TTRS, Ibis White, Black Alcantara, Sport Exhaust Pkg - 32k miles
'14 Audi Q5 TDI, Glacier, S Line, Sport Int, Nav, B&O, Tow - website - 20k miles
'09 VW Tiguan 2.0T, Candy White - Hers - 70k miles Past:
'04 Porsche 911 Turbo, Speed Yellow, X50 - website - 45k miles '08 Audi A3 2.0T, Ibis White, DSG, S-line - website - 54k miles '02 Audi S4 Avant, Imola Yellow, APR Stg3 - website - 191k miles '01.5 VW Golf 4dr 1.8T, Satin Silver, APR Stg3 - website - 203k miles
'00 Audi A4 1.8T, Silver, APR Stg2 - website - 61k miles
I find even in D if I floor it w/o KD it still drops a lot of cogs... The KD button is almost pointless as far as I can work out!
2013 Audi SQ5 TDI Glacier White, 21" alloys
Fine Nappa Leather Seats: Black, Headliner: Black, Inlays - Carbon atlas, Leather package Plus
Adaptive headlights, Advanced key, Audi drive select, Audi hill-hold assist, Audi Parking System Advanced, Bang & Olufsen Sound System, Black roof rails, Climate cup holder, Deletion of TDI technology designation at rear (keeping SQ5 and V6 T on wings and added extra T), Door mirrors – elec adjustable/folding/heated/auto-dimming with memory function, Dynamic steering, Electrically-adjustable front seats with memory function, Heated front and outer rear seats, High-beam assist, MMI navigation plus, Mobile telephone preparation – High with Audi connect, Audi side assist and Audi active lane assist, Power-operated tailgate, Privacy glass, DAB digital radio, Side window blinds – manual, Towing equipment, Rear bench seat plus, Rear side airbags, Removable net partition, Retractable and extendable sun visor, 3-spoke multi-function flat bottomed steering wheel with gear-shift paddles, Storage package, Tyre pressure loss indicator, Underfloor storage tray in boot