@JCM1 I would be interested to hear you compare and contrast the driving experience of the 500E and the 928GTS —- especially if both are automatics!
Well I really enjoy driving both!
I've had the GTS since 2007 and have done a lot to address some of its well know problems, i.e., excessive oil consumption (no oil drain back holes on the pistons) by installing a crankcase vacuum system, upgraded the water pump, alternator, etc. Now recently ordered the EZK-S, a chip for the LH module that creates a custom advance map for each cylinder!! I expect that will make an already peppy engine even more enjoyable.
They have different personalities but also many similarities. As you may know, the 928 GTS shares the same transmission as the 500E albeit with a slightly different shifting setup - Porsche set up the GTS to stay in gear until you reach red line or back off on the accelerator. Also, I think the gearing is different for the 500E with the final drive a 1:1 while the GTS is a bit lower I think allowing it a top speed of 171 mph. Both have the same drop a gear when full throttle is applied.
The 500E has undergone a lot of improvements since I first got it sigh unseen in 2017. Transmission rebuild, complete redo of the suspension, air ride, bushings, power steering, fuel pumps, new upper and lower wiring harnesses, new headliner, SA brakes, fresh exhaust/resonator, cats, and significant cutting/welding to address rust in the battery tray, rocker panels and most recently on the rood trim panel clips. I also just replaced the LH module (after hearing the FP relay ticking away under the rear passenger seat) and replace the distributor rotors and caps with fresh Bosch units that have been notched to allow for proper venting of moisture. All I can say is WOW what a difference in performance. Pre- LH/distributor changes the 500E was a quick and steady ride but now it's a monster waiting only for a jab from the right foot.
Driving the 500e at speed is a bit more confidence inspiring than the GTS which is significantly stiffer and has the Weissach rear link preventing over steer on deceleration. The 4 link suspension of the 500e is rock steady and makes high speed driving less of a big deal than in the GTS. I often find I'm driving much faster than I think in the 5000E! What a Q-ship!
I have yet to take the 500E on a long trip and do look forward to doing that once this terrible COVID 19 pandemic is behind us. It is really a fantastic highway cruiser and I hope to take it to Laguna Seca for the races next year. The GTS is a pure pleasure to drive at high speed. On a return trip to Vancouver from Laguna Seca I was well in to the triple digits for extended periods of time on I5 and the car was so settled and hunkered down it was incredible. It really comes into its own above 130 mph!
Breaking is similar now that I have the Silver Arrows and the big difference is that with 500E I have room for 4 whereas with the GTS it's two adults and maybe a small pet in back. Fuel economy is about the same.. depending on driving style with low 20 mpg for each when driven in compliance with highway speed limits.
I feel very fortunate to have two of the finest German V8s made!
All the best,
Joe