These are my observations with my 14 AWD 3.0 SC car that we have had for 3 months with 4k miles.

1. The car starts off in first. Mine has always done this. Being an old GM tech, I count the shifts to make sure. My 07 XK also starts off in first.
2. There is no lag. The supercharger is great and has no lag that I have noticed even with spirited driving above 100mph. You are noticing the transmission shift points.
3. I hate the ECO crap. You can lift your foot off the brake pedal or slightly turn the steering wheel and it will start back if you decide not to disable it.
4. I have not noticed the fan running after shutting the car off. We are in the 90's during the days now. I didn't hear it yesterday.
5. The AWD system is great. I did finally get to see it in action during a trip to the Gulf. We were caught in a rain storm with water standing in spots on the road. I thought the car was in a hydroplane situation due to the sound. It never did and I never felt it in the steering.
6. In Sport and Dynamic, I noticed different shift patterns and what seemed to be different steering.
7. My car has been getting 25mpg or so. But I do notice if I buy gas from a certain place, it will only get 19mpg.

 

Also as far as fuel economy goes the computer seems to be a bit inaccurate. When I hand calculate it's usually .2-.4mpg less.

 

07XKJaguar,
1. nice to see someone other than myself able to count from 1 to 8
2. The lag is only felt at low rpm (1000~3500) under WOT, which should not be felt with a supercharger set-up . It has nothing to do with what speed you are driving. Also, at 100mph you are already in the higher rpm range where the compressor is pumping a lot of air, even in 7th-8th gear. I still think it's the ECU mapping + knock sensors that for some reason restricts the boost profile at low rpm acceleration. The result is the acceleration is not linear under WOT from idle - almost feels like a turbocharged engine rather than supercharged. Could be also this AWD system is not capable of taking very high torque load stress off the line and is protected. I always wondered why Jaguar does not upgrade the 3.0 SC cars to the 380 hp output used the f-type? It's the exact engine with nothing but ECU mapping change......seems to me like a no-cost, no-brainer free power....

 

Yidal, are you using 93 octane? Not to start another gas debate but if you are using 91 octane that might be partially the cause for your lag or sluggishness. These cars are designed to run well on 91 octane however the ECU of boosted cars will adjust favorably for the increased knock resistance of 93 octane...it is especially noticeable if you are in the heat of the summer and you are already down on power from heat soak.

 

You have the XFR so you don't feel the lag, and I'm coming off the 2011 V8 SC also, which never exhibited this lag either. This is why I immediately noticed this, even on my first test drive of the 3.0. I tend to always gas-up at the same local station with 93 octane.

 

I hear you, yeah you must be feeling the seat of the pants difference between the 3.0L and 5.0L boosted engine. Ironically I do notice some lag at the lower rpms if I am driving in normal mode or Dynamic without Sport mode engaged. That is fixed pretty easily by dropping into the lowest gear available using the paddle shifters or switching to S, so I chalk it up to the ECU mapping. It's the primary reason I have been talking myself into a tune, I would love to shift the power band left a little and increase the throttle response during "normal" driving.

 

Definitely do a tune. I did ETG tune on my SC after the first 7,000miles and LOVED it- she became even more of a beast and super-sleeper. Never had a problem. I will do a tune (probably with Eurocharged) on my new 3.0 after about 4-5,000 miles, even though there is very little feedback out there on the 3.0 tunes.

 

Nice that is great feedback! I was thinking about being one of the first people to give that new vendor with the android based tune a shot because of the simplicity. Also cheaper than some of the other options out there. Sorry to derail your thread but I would be really interested to see what a tune does to your car if you go that route because I would not be opposed to picking up a V6 S F-Type in the future....and I would love to see it with a bump in power.

 

It's interesting to see people getting such high MPG. I must be doing something wrong, because I've never seen anything close to 25+ MPG. My average highway is like 20-22 and city 12-14. The computer in the car shows slightly higher, but when I double check the numbers, they fall short. I use only 93 and 91 octane (mostly 93). Like I said earlier, gas guzzling doesn't bother me at all as I expect it in such a vehicle. But seeing the astonishing MPG others are getting has me raising my eyebrows.

 

Regarding gas mileage, I'm on my 3rd (leased) XF and to summarize (~70% town/suburban driving, 30% hwy):
2010 5.0 V8 NA. Average for 18,000 miles of ownership was 16.5MPG. Best hwy 26.7MPG seen numerous times.
2011 5.0 V8 SC. Average for 39,000miles of ownership was 16.0MPG. Best highway 24.8MPG seen numerous times
2014 3.0 V6 SC AWD. Average for first 250 miles of ownership 17.2MPG. First highway trip 27.7MPG. I feel this car can possibly see 30MPG hwy after engine loosen-up

 

I drove a RWD 3.0 when I got my AWD but I can't remember if it had the same "lag" at takeoff, has anyone drove a RWD XF and noticed if it's the same as the AWD?

 

Unfortunately yes- I’ve driven both RWD and AWD 3.0 loaners, and the first time I actually pulled off the road and opened the hood, convinced my dealer had re-badged a 2.0T as a RWD 3.0. Everything about it- the throttle response, the power delivery, the exhaust noise- they all said “turbocharged”, not “supercharged.”

Typically, supercharged engines, while different in feel from naturally aspirated, are essentially lag-free, and my prior experience with Jaguar’s larger S/Cs was no different- the 5.0 S/Cs I’ve driven have instantaneous responsiveness, despite “chunkier” power delivery vs. the 5.0 N/A. I don’t like to add fuel to the various anti-3.0 discussions, as I’m a big fan of the brand, and Jaguar needs the 3.0 to sell successfully, but there are some drivetrain issues that could use more fine tuning.

 

Have not noticed any lag issues with the 3.0. It does not possess as much low down grunt as a larger displacement motor. Supercharging helps this but there is no replacemnet for displacement. You just have to be more aggressive with the throttle and be willing to rev it.