Automatic is £205 Per Year Diesel. or £112.75 for 6 Months (£225.50 Per Year).
Same Car first Registered Before 1ST March 2001 is £180 for 12 Months or £99 for 6 Months (£198 Per year)
So yes it is more than the manual Gearbox Version.
Manual: £140 for 12 months or £77 for 6 Months (Total £154 Per Year) if registered after 1st March 2001.
Strangely if Car registered before 1st March 2001 Road Tax now goes up to:
£180 for 12 Months or £99 for 6 months as it is now done on engine size for earlier cars not emmisssions.
see also here for all other rates etc:
http://www.direct.gov.uk/en/Motoring...le/DG_10012524
Rates are exactly the same for CDT and more powerful CDTi engines.