On a simpistic basis the 195s bring more capacity than the pacers, that are coming out of the fleet - a 142 is 30m long, whereas a 2 car 195 is 47.280m & 3 car is 70.630m long.How long will it be before it becomes apparent that 2 car 195’s will be inadequate and why are 2 car units allowed to be ordered in this day and age? The 3 car sets will quickly go over capacity I suspect too, 4 car units should have been ordered initially.
It's going to be a bit more complicated in reality as the 195s are planned for the Northern Connect services, allowing a fleet cascade, so there should be more capacity all round as 150s (at 40m) replace 142s on services.