BMW is obviously proud of the V12-powered Z3 prototype that it had recently shown to the public. BMW engineers from its performance sub-divisions have built more than a few incredible prototypes that have not been unveiled. When these were first built, they were probably fawned over by auto fans but we find years later that we’re still picturing them just in our dreams. The sporty Z3 convertible was produced from 1996 to 2002. The M roadster produces 315 hp due to the M3′s 3.2-liter, inline-six powerplant. Apparently, BMW M engineers were testing the limits of the convertible by placing a V12 under the hood. It appears that for this experiment, the older 750i model had lent its 5.4-liter V12 with 322-hp and 361 lb-ft of torque. BMW said that the Z3 prototype was made many years ago and that there’s no surprise that it didn’t lead to anything. Of course, we have to remember that about 10 years ago, a vehicle with 322-hp is already very impressive.
