As mentioned it’s not inherent to the boxer configuration. My ‘95 Impreza 1.8 dynoed all of like 78whp (and that was
corrected for altitude hahaha)…but there wasn’t any dip.
Fun story about how that econobox got on a dyno: got a two-for-one at the first AWD dyno in Denver almost 20yrs ago and the other car — my stage 2 bugeye WRX — almost 3x’d it
