BMW‘s current generation 6-Series, codenamed E63 in coupe flavor and E64 as a convertible, had some big (if not terribly successful) shoes to fill when it came out as a 2004 model. Meant to be a spiritual successor to BMW’s ‘sharky’ 1980s 6-Series, it took over “big GT” duties after the 8-Series was retired in 1999.

However, instead of offering a V12 in its top-range model, BMW went instead with the F1-inspired 5.0 liter V10 powerhouse to create a new M6 with an SMG III transmission and a carbon fiber roof.

Much like Chris Bangle’s 7-Series and 5-Series models, the new 6-Series was a bold move away from the Bavarian firm’s stagnant (but undeniably classic) lines and into fresh styling territory.

Debut (Concept): 1999 Frankfurt Auto Show (Z9 Gran Turismo Concept) ; 2000 Paris Motor Show (Z9 Convertible Concept)

Debut (Production): 2003 Frankfurt Auto Show (2004 Model Year Coupe) ; 2004 North American International Auto Show (2004 MY Convertible)

Designed Under: Chris Bangle

Lost in Translation: First of all, we didn’t get the lower, rakish, Batmobile-like stance of the Z9 GT. The unrealistic bisected steering wheel didn’t make the cut (thankfully); nor did the shifting gull-wing doors. Also, the neat inset driving lights didn’t carry over to the production model.

But we got to keep: The concept’s general appearance, along with BMW’s latest double kidney grilles. Also, the iDrive system hinted at in the GT was shown functionally in the convertible for the first time.

And gained: A more realistic wheelbase, roof line, and interior similar to that of the Z9 Convertible Concept.

Did you know? The Z9 Gran Turismo debuted with “the world’s first V8 turbodiesel engine”, found originally in the 740d.

Where is it now?: Getting ready to be put out to pasture, now that the F12 6-Series is just around the bend.

By Phil Alex

BMW Z9 GRAN TURISMO AND CONVERTIBLE CONCEPT

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BMW 6-SERIES COUPE AND CONVERTIBLE