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Audi's 4.0 L Powertrain With Quattro

2013 Audi A8L: Nvidia Graphics, Wi-Fi, LED Lights, And Google Earth
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Propelling the A8L from 0-60 in a mere 4.2-seconds (according to Motor Trend's tests) is a 4.0 L V8 engine rated for 420 hp. It makes 444 lb-ft of torque at a very low 1500 RPM and sends the nearly two-ton A8L down the quarter-mile in 12.6 seconds. That's sports car-fast in a limousine form factor. The four-liter motor with overhead cams, variable valve timing, and a pair of twin-scroll turbochargers increases power while maintaining efficiency.

Speaking of efficiency, this configuration receives an EPA rating of 16/26 MPG in city and highway driving. That might seem low compared to a hybrid, but my wife’s minivan gets close to the same mileage with 134 fewer horses and much lower performance stats. So long as you stick to highway cruising, this land barge will reward you with respectable fuel consumption.

Audi mates the 4.0 L V8 to a very familiar ZF 8HP eight-speed automatic transmission, which is used in pretty much everything from Jeep's Grand Cherokee to Jaguar's F-Type, which are both vehicles we’ve reviewed. The A8L's ZF 8HP is no different. It delivers quick and smooth shifts, though it's not as snappy as the F-Type. Power is then sent to all four wheels through Audi’s Quattro all-wheel drive system. By default, the power split is 40/60, with a bias to the rear wheels.

Naturally, the A8L's powertrain makes it more of a joy to drive than if the car were underpowered. The four-liter engine is great for merging into traffic or overtaking on a two-lane road. Fuel efficiency suffers, of course, if you can't keep that tendency under control. But something tells me that anyone dropping six figures on an executive cruiser isn't sweating the price of oil. Quattro keeps the A8L planted around corners, while the rear bias helps prevent understeer. Although the car weighs almost two tons, the A8L is still a lot of fun to drive.

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  • 3 Hide
    cypeq , January 24, 2014 12:34 AM
    Tom's add regular Refirgerator reviews they also get touchscreens built in.
  • 3 Hide
    vertexx , January 24, 2014 1:12 AM
    Aren't 2014 models out by now?
  • 3 Hide
    Zeh , January 24, 2014 2:08 AM
    One can always dream...
  • 1 Hide
    cozmium , January 24, 2014 3:02 AM
    Another prime example of how B&O are only made for big wallets and not discerning audio enthusiasts. Bowers and Wilkins, such as in the Jaguar XF, sound utterly fantastic. In a car you have a minefield of acoustic problems to overcome, and it takes more than slapping in fancy looking speakers.
  • 1 Hide
    Flicules , January 24, 2014 3:39 AM
    I would like to see an article about the new Infotainment system on the Mazda 3(MY14)
  • -3 Hide
    Nintendo Maniac 64 , January 24, 2014 3:39 AM
    *reads title*...so basically all the things Tesla already had in 2012?

    (wifi hardware was present but the software wasn't enabled since the first year of 3G was free)
  • 1 Hide
    vertexx , January 24, 2014 6:08 AM
    The 2014 A8 L features a Bose sound system, or perhaps that's the standard option.
  • -3 Hide
    Metalrenok , January 24, 2014 6:26 AM
    Car reviews? Seriously Tom's?
  • -7 Hide
    Metalrenok , January 24, 2014 6:44 AM
    Car reviews? Seriously Tom's?
  • 2 Hide
    bhaberle , January 24, 2014 7:07 AM
    So umm. It is important to know that even lower end Audi's like the S4 (standard) and the A4 (optional) have these features, such as wi-fi, etc. And yes the wifi hotspot was available in last year's versions of these cars (which actually is the 2013 ones.) The a4/s4 versions are not touch though, which is not really an issue.
  • 1 Hide
    user 18 , January 24, 2014 7:43 AM
    Kind of sad that such a nice car seems to only come with an auto transmission.
  • 1 Hide
    holmes4 , January 24, 2014 8:01 AM
    Regarding USB and audio inputs - Audi typically puts a connector for these in the glove compartment. You may need to buy a custom adapter cable depending on your device. At least on my 2013 A4, it can control an iPhone through the MMI this way, though I just use the Bluetooth integration.
  • 1 Hide
    tuanies , January 24, 2014 8:20 AM
    Quote:
    Another prime example of how B&O are only made for big wallets and not discerning audio enthusiasts. Bowers and Wilkins, such as in the Jaguar XF, sound utterly fantastic. In a car you have a minefield of acoustic problems to overcome, and it takes more than slapping in fancy looking speakers.


    I've never heard the B&W in the XF. The Meridian system in the XJL is quite good though. The Acura Krell system in the RLX is the best system I've heard so far.

    Quote:
    I would like to see an article about the new Infotainment system on the Mazda 3(MY14)


    It's on the list of vehicles to cover. It's a very good vehicle and the new system is a massive improvement over the terrible TomTom system in the 6 and CX5.

    Quote:
    *reads title*...so basically all the things Tesla already had in 2012?

    (wifi hardware was present but the software wasn't enabled since the first year of 3G was free)


    Audi had it in the A8 since 2011

    Quote:
    The 2014 A8 L features a Bose sound system, or perhaps that's the standard option.


    Bose is standard on Audi's. B&O is a $6300 option.

    Quote:
    Car reviews? Seriously Tom's?


    Yes
  • 2 Hide
    tuanies , January 24, 2014 8:23 AM
    Quote:
    So umm. It is important to know that even lower end Audi's like the S4 (standard) and the A4 (optional) have these features, such as wi-fi, etc. And yes the wifi hotspot was available in last year's versions of these cars (which actually is the 2013 ones.) The a4/s4 versions are not touch though, which is not really an issue.


    Yes the A4 has MMI as well, but the touch pad is quite excellent. Also the interior ergonomics and overall package are different. The next gen A4 will have touch. Audi has a combo touch / control knob that debuted in the A3. I imagine it will make its way to the next A4.

    Quote:
    Kind of sad that such a nice car seems to only come with an auto transmission.


    Unfortunately driving with a third pedal will be a forgotten art. However, the 8-speed ZF is a very good transmission. I love manuals and everything, but will gladly trade a third pedal for adaptive cruise control with stop and go and the 8-speed ZF for daily driving.

    Quote:
    Regarding USB and audio inputs - Audi typically puts a connector for these in the glove compartment. You may need to buy a custom adapter cable depending on your device. At least on my 2013 A4, it can control an iPhone through the MMI this way, though I just use the Bluetooth integration.


    You are correct. Ours only had the iPod connector, a 30-pin one at that. It's highway robbery that Audi sells the cables for about $70 to use a feature that should be standard by now.
  • 0 Hide
    xenol , January 24, 2014 9:40 AM
    I'm probably going to get downvoted for this but...I find it annoying people were all "make Google Glass illegal to wear while driving" because of the potential to distract the driver. And yet I see the smarts of this car having the same potential.
  • 1 Hide
    tuanies , January 24, 2014 9:48 AM
    Quote:
    I'm probably going to get downvoted for this but...I find it annoying people were all "make Google Glass illegal to wear while driving" because of the potential to distract the driver. And yet I see the smarts of this car having the same potential.


    People will always find ways to distract themselves if they aren't focused drivers. You can have all the electronic nannies and lock outs you want, but that doesn't stop a parent turning around to yell at their kids before plowing into the car in front of them IMO.
  • 0 Hide
    CaedenV , January 24, 2014 10:04 AM
    that is a lot of buttons... way too many buttons...Don't get me wrong, I love me some buttons to press, but if complicated games that have 100 different things going on can get by with using just a few of the 16 buttons and 2 sticks available on your average controller, then surely a car's navigation and infotainment system can make due with far less for a much simpler experience.Wake me up when cars get a proper HUD to control the car with rather than overly complicated center consoles that are needlessly complicated and difficult to operate while driving.
  • 1 Hide
    Anonymous , January 24, 2014 10:27 AM
    I've never had 100 grand to drop on a vehicle, but I'd be satisfied with a car that doesn't require thousands of dollars in repairs after a few hundred thousand kilometers
  • 1 Hide
    3ogdy , January 24, 2014 2:37 PM
    Quote:
    Car reviews? Seriously Tom's?
    Upper part of the page, right under the Tom's Hardware logo:"The authority on TECH". So, what were you saying your problem was?
  • -1 Hide
    cypeq , January 24, 2014 3:18 PM
    Quote:
    Quote:
    Car reviews? Seriously Tom's?
    Upper part of the page, right under the Tom's Hardware logo:"The authority on TECH". So, what were you saying your problem was?
    Nothing it's obvious sponsored advertisement article move a long nothing new.
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