Vehicle & Technical > Discovery

300 tdi second alternator

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adamdanshona:

--- Quote ---Hi, wots the alternator? I have a 300Tdi and want a good one. Is it an upgrade?
Cheers
--- End quote ---
The alternator uses the power of the engine to act as an generator to charge up the battery.
The standard on is about 60 amp,100 amp ones are available as an upgrade.
If you have spot lights,winches,cb radio etc they all draw current from the battery and can drain it quickly.

Range Rover Blues:
I might be wroing here but I think the 300 TDi uses the same alternator as the late hard dash RRC V8, which were available as 100 amp units for EAS/Airconn/heater screen/seats etc fully loaded SE spec cars.

I know the interim engine runs the P38 style alternator which have a reputation for letting go.

Big Andy:
Defender 300TDI alternator is 65 Amp, Discovery 300 TDI alternator is 100 Amp.

If you want to fit an extra battery the easiest and cheapest option is to fit a split charge relay, unless you are running a winch the standard alternator will provide sufficient power.

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