I am not an expert on these tank engines but it started to interest me..
"The tanks you have listed, just like all previous marks before them, did not have diesel engines. The Panther, Jagdpanther, as well as the Tiger I and II had the same Maybach HL230P30 gasoline engine. In fact, Maybach never produced diesel engines."
http://www.feldgrau.net/Messages/25895.html
----------
The next 600 Ausf D (also called Ausf D2) were powered by a more powerful 700hp HL 230 P 30 engine, which became the standard power plant for all later models of the Panther.
http://www.achtungpanzer.com/pz4.htm
-------
The Ausf D and G both had the same engine at least ( as well as Jagdpanther )
( Maybach HL 230 P 30 / 12-cylinder / 700hp )
Stats from
http://fly.cc.fer.hr/~mesic/panzer/panzer5.html
And the same engine for Tiger II
http://www.panzerworld.net/TigerII.htm
-----------
Just a site on this engine model
but interesting
http://www.panzerworld.net/HL230.htm
---------
This might explain the diesel thought:
The Daimler-Benz version, VK 3002 (dB), had leaf springs and a diesel engine.
The MAN design followed more of the traditional German tank designs. Torsion bar suspension, Maybach HL 210 gasoline engine with power to the front sprockets. The engine was later changed to the Maybach HL 230 P 30.
http://www.wwiivehicles.com/html/germany/pzkpfw_v.html
[img]smile.gif[/img]