New AJ133 5.0 liter V8 for the Jaguar XF

Jaguar XF-R

When the Jaguar XF was first launched, it was available with 3 engines – a 3.0 litre V6, a 4.2 litre V8 and a supercharged 4.2 litre V8 (AJ34 and AJ34S). Then came the range-topping XFR, with an AJ-V8 Gen3 (AJ133) engine – 5.0 litres of displacement, 510 PS and 625Nm of torque.

Jaguar AJ-V8In certain or most markets, the non-R XF is also now offered with variants of the new AJ133 5.0 litre V8 engine. Depending on the market, it either complements or replaces the 4.2 litre previous generation AJ engine. A normally aspirated XF 5.0 makes about 385 PS while the supercharged version makes 470 PS, which is less power than the XFR’s 510 PS tune.

The new AJ133 5.0 litre V8 engine uses an all-new high pressure die-cast aluminium block with cast-in iron liners and cross-bolted main bearing caps. Despite the larger displacement, it is more compact – shorter by 24mm thanks to relocation of the oil pump. It has direct injection, which allows the compression ratio to be raised to 11.5:1 in the normally aspirated model, and from 9.0:1 in the 4.2 V8 supercharged up to 9.5:1 in the new 5.0 V8 supercharged.

The engine also features a new type of variable cam system. The four VCT (variable cam timing – intake and exhaust, 2 V banks) units move via positive and negative torques generated by opening and closing the intake and exhaust valves instead of by hydraulics. This allows the engine oil pump to be reduced in size and consumes less power. The supercharger and intercooler are packaged within the V-bank of the new engine – this reduces engine height and helps comply with pedestrian crash safety regulations.

The normally aspirated version features a variable inlet manifold and also camshaft profile switching on the intake cam, using hydraulically-operated two-piece tappets. The low-speed cam uses a 214 degree duration and 5.5mm valve lift while the high-cam uses a 250 degree duration and 10.5mm valve lift. The switch between low and high cams happens at 2,800rpm at high load, and this varies up to 4,500rpm at lighter loads.

UPDATE: Jaguar Malaysia (SISMA Auto) will be bringing in the 510 PS 5.0 litre supercharged Jaguar XFR into Malaysia this August. The product line-up will change somewhat. In Malaysia, the 3.0 V6 will remain, but the 4.2 normally aspirated will be replaced by the 5.0 normally aspirated, and the 4.2 supercharged will be replaced by the XFR. The non-R 5.0 supercharged in 470 PS tune will not be sold here, probably because it will be too close to the XFR.

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Paul Tan

After dabbling for years in the IT industry, Paul Tan initially began this site as a general blog covering various topics of personal interest. With an increasing number of readers paying rapt attention to the motoring stories, one thing led to another and the rest, as they say, is history.

 

Comments

  • Kumar_Pala on Jul 01, 2009 at 5:34 pm

    Fantastic British car! Very well built-in quality.

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  • cam profile switching is depending on load…that great!!

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  • theanswer on Jul 01, 2009 at 5:57 pm

    hurmm..if i wasnt mistaken..this car can run 300kmh rite? can put together in one group with m5,quattroporte..etc.

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  • bmpower on Jul 01, 2009 at 7:50 pm

    why does the front look a bit of chery alado?

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  • Christopher Tan on Jul 01, 2009 at 10:32 pm

    Wow.Super power.

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  • henry on Jul 01, 2009 at 11:10 pm

    XFR is definitely a rival to M5.. i hope this 9th July XJ would have XJR version as well, probably can head to head with S55 AMG.. good alternative from British marque..

    Like or Dislike: Thumb up 0 Thumb down 0
  • Gajen on Jul 02, 2009 at 9:57 am

    5.0 v8 normally aspirated 385 hp?…lexus ls 460 produces 385 with a 4.6 v8

    Like or Dislike: Thumb up 0 Thumb down 1
  • KitKat on Jul 02, 2009 at 10:00 am

    bmpower said,

    July 1, 2009 @ 11:50 am

    why does the front look a bit of chery alado?

    —————–

    No way man, the Alado is boxier…

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  • paparadzi on Jul 02, 2009 at 10:52 am

    How much is the Malaysian road tax for a 5000 cc cars?

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  • PROTON TIGER vs BRIT on Jul 04, 2009 at 1:41 am

    buy this JAGUAR and then contribute so much to Malaysia ecoomy by paying a very "good" road tax money.. government of Malaysia and British must be very happy :)

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