Quoting Kyle Bartley
More warp engines dont make a ship faster. Its the power plant/shape desin. Adding more nacelles is like adding more wheels or propellers.
actuly propellers can make a ship oraircraft go faster. just look at the rms mauretania launched in 1909. it held the record for fastest atlantic crossing untill 1929 and that had 4 props wen most other liners had 3