Conventional compression is started with an electrical starter motor, at a speed of 100-150 rpm. This speed gives two problems: gas leakage through the gaps of the piston rings and slow piston movement leading to higher heat losses. Both effects lead to a decrease of the cylinder pressure and temperature at the end of the compression, and therefore starting problems.

In the Chiron the compression accumulator provides the energy to the gases of the combustion cylinder. At a cold start, the hydro-mechanical losses are higher. This can be compensated by choosing a higher pressure in the accumulator. The pressure is even elevated extra to raise the compression ratio a little more at cold start. This compensates the effect of a longer ignition delay as an effect of the colder combustion air. Aside from this compensation, the piston movement at cold start is the same during normal operation. Cold start problems as mentioned above are not relevant for the Chiron: the engine starts without starting aid.