The name of the book is U-BOATS (technique and evolution of the german submarines)
I don't know if there is an english verion of the book; but if you want I will scan th pages of the book where there are the drowings of the sub.
these are the torpedo types:
type C35/91
length: 475 cm/propulsion: AV 3-cil/range: 500 mt with 27 knt
type C45/91 Bronze
length: 511cm/propulsion: AV 3-cil/range: 1000 mt with 27 knt
C45/91 Stahl
length: 515cm/propulsion: AV 3-cil/range: 1500 mt with 27 knt
type C45/91 Stahl/mod
length: 515cm/propulsion: AV 3-cil/range: 1700 mt with 27 knt
type C/03 AV
length: 515cm/propulsion: AV 3-cil/range: 3000 mt with 26 knt
type C/03 AVK
length: 515cm/propulsion: AV 3-cil/range: 3500 mt with 27 knt
type C/03 D
length: 515cm/propulsion: steam 3-cil/range: 5000 mt with 27 knt
type C/06 AV
length: 565cm/propulsion: AV 4-cil/range: 3600 mt with 30 knt
type G/06 AVK or K
length: 565cm/propulsion: AV 4-cil/range: 4200 mt with 27 knt
type C/06D
length: 565cm/propulsion: steam 4-cil/range: 5900 mt with 27 knt
type G/6 AV or K-I
length: 600cm/propulsion: AV 4-cil/range: 5000 mt with 28 knt
G/6 AVK mod or K-II
length: 600cm/propulsion: AV 4-cil/range: 5500 mt with 27 knt
type G/6 D or K-III
length: 600cm/propulsion: steam 4-cil/range: 8400 mt with 27 knt
type G/7
length: 702cm/propulsion: steam 4-cil/range: 9700 mt with 27 knt
type H/8
length: 800cm/propulsion: steam 8-cil/range: 14000 mt with 27 knt
NOTE: the types C35/91 and C/45 91 entered in service in early 1915;
the types G/6s entered in service in early 1916;
the type G/7 stopped its activity in middle 1917;
the type H/8 was only used by big submarines and U-kreuzers.
legend:
AV= Anwarm-Vorrichtung (preheating device);
AVK=Anwarm-Vorrichtung und erhohter Kesseldurck (preheating device and increase pressure boiler)
cil= cylinders