Yes, a larger alternator will charge your batteries faster when the engine is running if you have a large enough battery bank that is run down, 8 or more golf carts or 4 or more 8Ds (large batteries). Most motorhomes come with 2 to 4 golf cart batteries or equivalents for the house or 200 to 450 amp-hours of battery capacity. These are in addition to the chassis battery or batteries, which are for the engine. (Some motorhomes have more house batteries than 4 and some use larger batteries like 8Ds, which are rough equivalents to 2 normal size batteries).

For normal wet cell batteries you don't discharge them more than 50% and the maximum charging rate is C/5 or capacity divided by 5, so each set of two golf carts (most are around 220 amp-hours of 12-volts for two) can handle a maximum charging rate of 220 /5 or 44 amps. 160 / 44 = 3.6 so a 160 amp alternator can charge 6 (3 * 2) golf cart batteries at maximum charging rate. (AGMs can handle higher charging rates, my memory says C/3, but I could be wrong). If you have 8 or 10 golf cart batteries a 220 amp alternator might make sense, if you dry camp a bunch.