There's a new set of technical features of the world's metros at Metrobits.org in the form of a sortable table:

CITY | TRAIN WIDTH | GAUGE | VOLTAGE | POWER SUPPLY (http://mic-ro.com/metro/table.html?feat=CIOPWDGGVOPC&orderby=WD&sort=DESC)

The data is from supposedly reliable sources like Schleife et al: Metros der Welt (1992), metrotram.it and others.

I'd be thankful for missing data, especially for the larger and newer systems (reliable sources, please).

Sao Paulo data are wrong. Gauge is 1600 in some lines, standard in others. Third rail in all lines except overhead in line 4. Voltage is 759 volts in lines 1, 2, 3 but 1500 volts in 4 and 5. Besides the Sao Paulo metro also includes CPTM lines, which are often neglected because its not the same company and the lines are converted from old railroads. It has 1600 gauge and different voltage.

759 V?
And do you have a source for those figures?

Manila data is missing: both systems use standard gauge and 750 V DC power via overhead wires.

Barcelona info is not complete AFAIK. L1 is ibarian gauge, and L8 is metre gauge...
(Probably the only urban railway network to have three gauges...)

759 V?
And do you have a source for those figures?

http://www.urbanrail.net/am/spau/sao-paulo.htm

Gauge: 1600mm; 3rd rail (759V); 6-car-trains
CPTM trains have overhead power supply

But that maybe a mistake, the voltage can be 750 volts maybe, Im checking.





EDIT:

Metro voltage for lines 1, 2 and 3 (third rail lines) = 750 volts
Metro voltage for line 4 and 5 (overhead power line) = 1500 volts
CPTM voltage (all lines) = 3000 volts

Manila data is missing: both systems use standard gauge and 750 V DC power via overhead wires.

Do you have a source?

Do you have a source?

I wrote a significant portion of the articles on the LRT and MRT on Wikipedia, and they have the sources there as part of the inline citations.

Hong Kong is not complete, since some (former KCRC lines) are 25kV.

Vienna metro line U6 uses 750 V DC overhead wire (catenary). All other lines use third rail as you already wrote.

Buenos Aires Data is ALMOST right
de line B runs with 800VCC 3 rail
line A with 1100VCC overhead
and the rest with 1500VCC overhead

Amsterdam also has rolling stock which is 2,65 m wide on line 50 (full metro line) and line 51 (hybrid metro / light rail line). This rolling stock has retractable steps bridging the gap between train and platform when operating on lines where also 3,00 meter wide trains are used.

On the light rail part of line 51 overhead catenary is used at 600 V (the same as on the tram network in Amsterdam).

Source (http://en.wikipedia.org/wiki/Amsterdam_Metro#Vehicles)

Barcelona info is not complete AFAIK. L1 is ibarian gauge, and L8 is metre gauge...
(Probably the only urban railway network to have three gauges...)
And no more 3rd rail power supply in Barcelona Metro since 2003-4. Now all is overhead wire.
Trains between 2.80 and 3.20 metres wide.