We told you last year that the 928 would share about 60% of its parts with the Panamera, and production would begin around 2011. Since both vehicles will be more GT than sports car, the Bentley Continental GT seems like a natural corporate part donor, though powertrains are likely to be exclusive between the two brands. The GT coupe market has been ablaze of late, with entries like the V8 Vantage, Continental GT, and M6 winning praise and buyers, so we can't see Porsche sitting on the sidelines for long. Besides, heavily disguised Porsche mules have been seen testing, so it seems as though the 928 is close to a done deal.
[Source: Auto Zeitung via Motor Authority]