For the Tiger project, Porsche develeoped its own design. It was based on their previous prototype, the Panzerkampfwagen IV Tiger (P) .
The superstructure was mounted at front, with 6 road wheels either side, mounted in double bogies. It used an interesting drive system, using two engines to power generators, which then drove electrical motors at the drive sprockets. This led to its demise, as it was complicated to repair, and very unreliable, especailly for such a heavy vehicle. After the Henschel Tiger design took the contract, the 90 chassis already built by Porsche were later develeoped into the Ferdinand/Elefant. Only one Tiger (P) entered service, as a command vehicle on the Eastern front, with an additional 100mm steel plate bolted on the front, bringing the frontal armor up to 200mm, although this was not as effective since it was not sloped. After the battle of Kursk, The Ferdinand was coated with Zimmermit ( Anti-Magnetic mine paint ) and a hull mounted MG 34 machine gun. This modification was later named the Elefant. The 8.8 cm Pak 43 L/71 was a ture tank-killing gun. It could penetrate the T-34 at ranges up to 3 miles away- impossible to the Panzer 3 with its 5 cm KwK 39 L/60 gun.