The clocks of the chip were 4.8ghz, not 4.2, and yes. Absolutely possible. A quad core 1195g7 scores around 5500. Add 15%, and then you have the small cores…Including those two (and a two others subscores that perform not well) ADL is still like 17% faster than your CML clock/clock, and close to 20% faster than the original SKL since IPC has been slightly improved by CML.
And still perform better at 4.2GHz than a 5.1GHz 10C CML..?.
EDIT: I think people think this chip has 8 big and no small, but the cache implies otherwise.