Maybe, but it'd be interesting to know from someone running one how the costs and reliability of the Fiesta R5+ have compared to running the conventional R5 package.
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I understand Your point from regular customers PoV, but if we compare the models in production by power, AUDI Ur Quattro stock car had 197 bhp, while the rally version (S1 E2) - 450+ bhp (that is 2.5 times more power max). Fiesta 1.6 Ti-VCT (MK7-MK8) stock has 120 bhp vs. 360+ on the 2017 rally version (probably over 400 anyway), so this is 3 times more power at least.
You didn't understood my point, but that's alright.
A bit different to compare those because the Audi was based on a performance car to start with and the Fiesta is based on a shopping trolley.
If we compare Peugeot 205 T16 (shopping trolley based Group B car) at ~450bhp with the most powerful Peugeot 205 GTi at 125bhp its 3.6x as much power.
If you compare 2017 Fiesta WRC with Fiesta ST (use performance version to be consistent) then say 380bhp vs 180bhp is 2.1x as much power.
Those were special homologation models for Gr.B supercars for God's sake. They existed only because of those gr.B cars. An average joe was driving 60 Hp car and a 400 Hp rallycar was something from Star Trek for him.
Current 1.6T WRC cars don't have any special torque due to the boost limitation. +/- 500 Nm isn't any impressive novadays.