Make it a turbo Diesel and I’m in.
From their Website:
How long would it take to develop a diesel powered Duke?
We know that the SI Duke engine runs on kerosene (JetA1) with few changes from an optimised petrol version. During our forth-coming test program we intend to try the engines on Diesel fuel as it is not greatly different (chemically speaking) from kerosene. We have high hopes that the Duke engine will become the the world’s first internal combustion engine to run on such a wide variety of fuels. Using spark ignition Duke engines with heavy fuels will result in much smaller and lighter engines than comparative compression ignition Diesel engines. We will release our test results as they become available.