Is this 2.5 a version of the old Audi 5 cyl.?

[bockegg]

I'm interested in a '06 NB 2.5. Does anyone know if this is a version on the 5 cyl. engine that VW and Audi used in their autos in the 80's?

I had a 5 cly. engine in my 1984 Audi 5000 S and in my 1985 VW Quantum. Both were fantastic engines. Good on gas and plenty of torque.

[Maggadog]

I do not know about the "old audi" engine, but my dealer said it is the same engine that is in the current audi, if I remember right. It is also the same one as in the Jetta.

[Deserion]

The 2.5L in the '06 NB, and the Mk5 Golf/Jetta platform is derived from the 5.0L Lamborghini V10. Not 100% exact, but it's based on a half.

-Des

[Maggadog]

So I guess my engine can be called either a "Lambo" or a "Ghini" depending on which half I have?

[bockegg]

Originally Posted by Deserion

The 2.5L in the '06 NB, and the Mk5 Golf/Jetta platform is derived from the 5.0L Lamborghini V10. Not 100% exact, but it's based on a half.

-Des

I heard that VW owns Lambo. and Bentley. I wonder if this engine is 1/2 of the Bentley 5.0L also?

Do you know?

[Deserion]

Originally Posted by bockegg

I heard that VW owns Lambo. and Bentley. I wonder if this engine is 1/2 of the Bentley 5.0L also?

Do you know?

The engine used in the Continental GT and Flying Spur is the W12 unit (albeit turbocharged) also found in the Phaeton and A8. Essentially, two VR6s paired at the crankshaft. The V8 in current Bentleys is carryover from their days joined with Rolls...

Technically, Audi owns Lamborghini. But VW owns Audi, so...

-Des

[bockegg]

Originally Posted by Deserion

The engine used in the Continental GT and Flying Spur is the W12 unit (albeit turbocharged) also found in the Phaeton and A8. Essentially, two VR6s paired at the crankshaft. The V8 in current Bentleys is carryover from their days joined with Rolls...

Technically, Audi owns Lamborghini. But VW owns Audi, so...

-Des

Very confusing this whole pecking order!

[VW_Rabbit]

Tech Highlights
This larger, heavier fifth-generation Jetta clearly needed more grunt to succeed in America, where the performance wars are fought by even entry-level cars. However, the German giant couldn't spare the euros to build a new engine from scratch just for us. The solution was to once again dig into VW's vast parts bin to cobble a successor to the aged 2.0-liter four.
The result is a 2.5-liter five-cylinder developed by the same man who designed Lamborghini's thrilling V-10. Unfortunately, the 2.5-liter is not the Gallardo's V-10 cut in half. Neither is it simply VW's familiar four-cylinder cast-iron block with an extra cylinder tacked onto the end. In fact, all three engines are part of the same extended family, as indicated by their shared 82.5mm bore and 92.8mm stroke.
The five-cylinder approach was an easy, inexpensive way to provide more displacement for the new VW energizer. Besides, VW's Audi division has plenty of experience making five-cylinder engines smooth and reliable. To minimize the increase in length caused by the additional cylinder, VW engineers moved the drive chain for the overhead cams from the front of the engine to the back. This move also prevents torsional vibrations in the crankshaft from affecting valve timing.
That change also makes it possible for the new engine to use one Lamborghini part—the aluminum-alloy 20-valve cylinder head found on one bank of the Gallardo's V-10. This greatly improves the engine's breathing over the two-valves-per-cylinder head on the previous four-cylinder Jetta. Combined with variable intake-valve timing, the result is peak torque of 170 pound-feet, up 38 percent from the old engine, despite just a 25-percent displacement increase. Peak power is up 30 percent to 150 horsepower, proving the new engine is biased toward torque.
Thanks to a modest 9.5:1 compression ratio and dual knock sensors, the 2.5-liter runs happily on regular fuel. It also promises to be a low-maintenance powerplant. The timing chain and coolant are guaranteed for the lifetime of the car. Spark plugs should go 60,000 miles, and oil changes are at 10,000-mile intervals.

Originally Posted by bockegg

I'm interested in a '06 NB 2.5. Does anyone know if this is a version on the 5 cyl. engine that VW and Audi used in their autos in the 80's?

I had a 5 cly. engine in my 1984 Audi 5000 S and in my 1985 VW Quantum. Both were fantastic engines. Good on gas and plenty of torque.

[Maggadog]

Thanks for the info, VW_Rabbit.

[dunno513]

When an engine is termed "taken from" another engine, it means that the angles, stroke, bores, valve clearance,and sometimes heads are all the same. It does not necessarily mean the cast used to create one was just split in half and put back on the assembly line.

What it does, however, is allow engineers to use the same components in the two engines due to their similar "designs"

This saves time and money when trying to pull an engine out of a hat quickly and cost effectively.

Ever wonder why you never hear "We just stuck these two 2.0's together to make this FINE V8"

[bockegg]

Originally Posted by VW_Rabbit

Tech Highlights
This larger, heavier fifth-generation Jetta clearly needed more grunt to succeed in America, where the performance wars are fought by even entry-level cars. However, the German giant couldn't spare the euros to build a new engine from scratch just for us. The solution was to once again dig into VW's vast parts bin to cobble a successor to the aged 2.0-liter four.
The result is a 2.5-liter five-cylinder developed by the same man who designed Lamborghini's thrilling V-10. Unfortunately, the 2.5-liter is not the Gallardo's V-10 cut in half. Neither is it simply VW's familiar four-cylinder cast-iron block with an extra cylinder tacked onto the end. In fact, all three engines are part of the same extended family, as indicated by their shared 82.5mm bore and 92.8mm stroke.
The five-cylinder approach was an easy, inexpensive way to provide more displacement for the new VW energizer. Besides, VW's Audi division has plenty of experience making five-cylinder engines smooth and reliable. To minimize the increase in length caused by the additional cylinder, VW engineers moved the drive chain for the overhead cams from the front of the engine to the back. This move also prevents torsional vibrations in the crankshaft from affecting valve timing.
That change also makes it possible for the new engine to use one Lamborghini part—the aluminum-alloy 20-valve cylinder head found on one bank of the Gallardo's V-10. This greatly improves the engine's breathing over the two-valves-per-cylinder head on the previous four-cylinder Jetta. Combined with variable intake-valve timing, the result is peak torque of 170 pound-feet, up 38 percent from the old engine, despite just a 25-percent displacement increase. Peak power is up 30 percent to 150 horsepower, proving the new engine is biased toward torque.
Thanks to a modest 9.5:1 compression ratio and dual knock sensors, the 2.5-liter runs happily on regular fuel. It also promises to be a low-maintenance powerplant. The timing chain and coolant are guaranteed for the lifetime of the car. Spark plugs should go 60,000 miles, and oil changes are at 10,000-mile intervals.

That is some incredible knowledge. I have no idea what you just said but "you 'da man!"

[GaryR53]

Originally Posted by Deserion

The 2.5L in the '06 NB, and the Mk5 Golf/Jetta platform is derived from the 5.0L Lamborghini V10. Not 100% exact, but it's based on a half.

-Des

Actually, the only Lamborghini component is the valve cover/head assembly.

Gary

[bockegg]

Originally Posted by GaryR53

Actually, the only Lamborghini component is the valve cover/head assembly.

Gary

Hi Gary,

I've heard that it is one of the best valve cover/head assemblies in the world. Just kidding. I've heard that it is a great engine by friends that are driving the 5 cyl.

Take care,
Mike

[GaryR53]

I agree it is a great engine. I drive mine in the "sport" mode (I have an automatic), which really kicks butt.

Seriously, my Beetle's acceleration is almost comparable to my former car, a 1996 Mitsubishi 3000 GT with a 3.0 liter V-6....almost. But then, the last couple of years I had the GT, I took it easy on the accelerator because the GT has an unfortunate tendency for the throttle to get stuck wide open if you floor it. I hope that never happens with my bug.

Gary

[bockegg]

Originally Posted by GaryR53

I agree it is a great engine. I drive mine in the "sport" mode (I have an automatic), which really kicks butt.

Seriously, my Beetle's acceleration is almost comparable to my former car, a 1996 Mitsubishi 3000 GT with a 3.0 liter V-6....almost. But then, the last couple of years I had the GT, I took it easy on the accelerator because the GT has an unfortunate tendency for the throttle to get stuck wide open if you floor it. I hope that never happens with my bug.

Gary

Wow. Stuck at full throttle! That is a very dangerous situation. I've never heard of modern cars doing that. If I see a Mitsu. on the road I'm getting the bleep out of the way!
Mike

[GaryR53]

Well, it's not as likely to happen in a car in which acceleration is controlled electronically. But, in the case of the '96 3000 GT, the throttle linkage is mechanical and, if the throttle body (through which the throttle cable goes) gets gunked up with dirt, oil and debris, the cable can sometimes get stuck. It's a very common problem with the 3000 GT, as I discovered when I researched online, after it happened to me the first time. That time, just tapping my foot on the accelerator pedal dislodged the cable and it returned to normal speed. However, the last time it happened to me, in 2004, this didn't have any effect and I was caught in 40mph traffic with a a racing engine that was nearly redlining. I had my foot on the brake, my right hand on the emergency brake and still, the car was doing at least 45mph. If I had let up on the brake, it would have accelerated to 80mph or faster within a couple of seconds. I finally managed to get it home, though, and, once on my driveway, killed the engine (didn't want to do that in traffic, while moving, as it would have torn up the transmission and probably caused an accident, as well). Since that experience, I was very careful to never floor it again. I did become nostalgic, though, for the days when I could put the pedal to the metal at 60mph and be doing 85mph about two seconds later.

Gary

[bockegg]

Originally Posted by GaryR53

Well, it's not as likely to happen in a car in which acceleration is controlled electronically. But, in the case of the '96 3000 GT, the throttle linkage is mechanical and, if the throttle body (through which the throttle cable goes) gets gunked up with dirt, oil and debris, the cable can sometimes get stuck. It's a very common problem with the 3000 GT, as I discovered when I researched online, after it happened to me the first time. That time, just tapping my foot on the accelerator pedal dislodged the cable and it returned to normal speed. However, the last time it happened to me, in 2004, this didn't have any effect and I was caught in 40mph traffic with a a racing engine that was nearly redlining. I had my foot on the brake, my right hand on the emergency brake and still, the car was doing at least 45mph. If I had let up on the brake, it would have accelerated to 80mph or faster within a couple of seconds. I finally managed to get it home, though, and, once on my driveway, killed the engine (didn't want to do that in traffic, while moving, as it would have torn up the transmission and probably caused an accident, as well). Since that experience, I was very careful to never floor it again. I did become nostalgic, though, for the days when I could put the pedal to the metal at 60mph and be doing 85mph about two seconds later.

Gary

That experience will get the adrenaline flowing.
Is that car gone now?

[GaryR53]

Yep, sure will!

I traded it in on my Beetle last month.

Gary

[bockegg]

Originally Posted by GaryR53

Yep, sure will!

I traded it in on my Beetle last month.

Gary

Well Gary you have no chance of that dangerous acceleration here. VW takes safety seriously.

[GaryR53]

That's good to know. I've had no complaints, so far.

Gary