Shark Lover

A guy at work who has a 912 said that the 928 V8 was designed b Audi. So I wanted to check if that is true or not I have searched but could not find any thing on the V8 that was used since he was talking about the production engine only. Thanks for any help.

Ponty

I think he's probably thinking of the 924 - the first variant borrowed it's engine from the Audi 100.

I'm pretty sure the 928's V8 engine was Porsche in-house design - all new as such.

cheers

Shark Lover

Thanks I kinda thought so but I did not want to correct him till I was sure.

linderpat

What Ponty said. The 928 was a clean sheet Porsche design. The initial 4.5 l engine was designed to eventually evolve all the way up to the 5.4 l monster with double the valves that it became.

namasgt

wasn't it supposed to be way more that 4.5 litter in the beginning, more like 400hp 6.0 litter, but fuel prices caused them to reduce the displacement to 4.5?

The only major thing that is not Porsche is the automatic transmission that was made by Mercedes, good transmissions....

928nut

Read this article - all you've ever wanted to know about watercooled Porsche history.

http://www.classicandperformancecar...._porsches.html

Podguy

You can give credit to GM too who pioneered the silicon aluminum block. It was used in the Buick and the Vega both which preceded the 928. GM also designed the syncros for the later transmissions.

jpitman2

AFAIK the Buick alloy block always had liners - it was unreliability in this area that made Buick stop production and sell the whole thing to Rover, who used a different method of liner insertion, and were happy with lower volumes. As long as you refer to the BOP 215 engine series that is.
jp 83 Euro S AT 54k

Cheburator

I hate to brake it to all, but aluminium goes way back as material used to make engine blocks and heads...

The Russians used it in 1931 in their V2 diesel - 38ltr, V12 diesel engine, with DOHC, 4-valves per cylinder and outputs between 450Bhp and 750Bhp...

That engine had liners btw...

JET951

In a strange twist of fate the Porsche 912 air cooled flat 4 engine was a derivative of the prewar VW peoples car which Ferdinand Porsche asked Hans Ledwinka of Tatra Automobiles of Czechoslovakia for help in designing the peoples car , read VW beetle, ( Tatra was the words leader in rear engined air cooled car maker technology) and it was only logical that Ferdinhand Porsche consulted Tatra ,this is because a mass produced peoples car had to be inexpensive & air cooling pre war was the only way.
Interestingly Tatra had just launched the Tatra T97 in 1936( designed much earlier) with its rear engined air cooled flat four engine , once Tatra had learnt that the peoples car ( VW beatle) was way too much like the Tatra ( Google Tatra T97) Tatra launched a law suite , but WW2 intervened & Tatra had to wait until the early to mid 1960's for a West German court to order VW of Germany to pay Tatra 3,000,000 Deutsche Mark in compensation for design infringements etc
The comparison of the shape but particularly the engine bay and layout of the VW beetle / 356/ 912 is way too similar to the Tatra of 1936
The second interesting part of this twist is that the 928 V8 engine was a clean sheet of paper in design for Porsche , in fact it may well be the first completely new engine Porsche designed & built for a road registered car of theirs .
What a twist , particularly from an owner of a Tatra based concept , and a good concept at that but not entirely VW Porsche , well thats what the W German courts thought

bradartigue

I find people to be almost desperate to link the 928 to VW, or in this case Audi. It belies ignorance.

Maleficio

http://www.flickr.com/photos/sestset...0466/lightbox/

brutus

The early tests of the V-8 driveline in a modified Audi body also added to the confusion about who did what to whom. Early versions of the engine were 5 liter displacement but they were thought to be too big and fuel ineffecient for the oil embargo of the time.

IcemanG17

Funny a 912 guy questions a 928 engine....but the 924 did use an audi 2.0L engine

As others mentioned, the 928 was a clean sheet of paper design...it was designed to make great power, with a wide powerband and meet emissions...which is why they went with such a large engine...so it could grow over time....

Initially they planned a 5.0L 16V with 300hp.... but the fuel crisis and soft economy of the time made the 4.5L 240hp engine come out....they talked about a 3.?L with 180hp too... I think the 300hp engine would have saved the 928....it would have outperformed the 911 by such a wide margin it might have succeeded in becoming the Porsche of the future it was intended to be....

Podguy

They were both designed by the same people. The 928 is not all that different from the bug.