1997 Land Rover Discovery

Electrical problem
1997 Land Rover Discovery V8 Four Wheel Drive Automatic 120000 miles

Starter replaced 12/2/09 by dealer, new battery (600 cold cranking amps) 1/11/10. The car still won't start without a jump or being hooked up to an electric battery charger for 15-20 minutes. Landrover dealersays that it's the alternator putting out only 12.5 amps rather than the norm of 14+, therefore wanting to put in a new alternator. I'm skeptical especially since it wouldn't start with a brand new battery. Any thoughts? Thanks
January 12, 2010.

Could be that something is draining the battery or the alternator with the voltage of 12.5volts not increasing to 14.5 volts or better

Or a problem within these areas starter, starter relay, park/neutral switch and ignition switch-blown fusible link/s

Jan 12, 2010.