All Standard Engines use 6 slots and XL 12 (6 in center and 3 in each side torso).
Clan XL engines use only 2 slots in each side torso
Some bigger engines provide additional slots for Heatsinks, which don't use critical slots of your mech but still needs tonnage.
Rating 
Tons (STD) 
Tons (XL) 
Heatsinks 
Speed (Speed Tweak) 
Turn speed 
Costs (STD) 
Costs (XL) 
Costs (CXL) 
100 
1.0

0.5

4

kph
( kph)

°/s
s

613,133

1,632,833

n/a

105 
2.5

1.0

4

kph
( kph)

°/s
s

643,800

1,714,500

n/a

110 
2.5

1.0

4

kph
( kph)

°/s
s

674,467

1,796,167

n/a

115 
3.0

1.0

4

kph
( kph)

°/s
s

705,133

1,877,833

n/a

120 
3.0

1.0

4

kph
( kph)

°/s
s

735,800

1,959,500

n/a

125 
4.0

2.0

5

kph
( kph)

°/s
s

766,500

2,041,250

n/a

130 
4.5

2.5

5

kph
( kph)

°/s
s

797,167

2,122,917

n/a

135 
4.5

2.5

5

kph
( kph)

°/s
s

827,833

2,204,583

n/a

140 
5.0

2.5

5

kph
( kph)

°/s
s

858,500

2,286,250

n/a

145 
5.0

2.5

5

kph
( kph)

°/s
s

889,167

2,367,917

n/a

150 
6.5

4.0

6

kph
( kph)

°/s
s

919,867

2,449,667

n/a

155 
6.5

4.0

6

kph
( kph)

°/s
s

950,533

2,531,333

n/a

160 
7.0

4.0

6

kph
( kph)

°/s
s

981,200

2,613,000

n/a

165 
7.0

4.0

6

kph
( kph)

°/s
s

1,011,867

2,694,667

n/a

170 
7.0

4.0

6

kph
( kph)

°/s
s

1,042,533

2,776,333

n/a

175 
9.0

5.5

7

kph
( kph)

°/s
s

1,073,233

2,858,083

n/a

180 
9.0

5.5

7

kph
( kph)

°/s
s

1,103,900

2,939,750

n/a

185 
9.5

6.0

7

kph
( kph)

°/s
s

1,134,567

3,021,417

n/a

190 
9.5

6.0

7

kph
( kph)

°/s
s

1,165,233

3,103,083

n/a

195 
10.0

6.0

7

kph
( kph)

°/s
s

1,195,900

3,184,750

n/a

200 
11.5

7.5

8

kph
( kph)

°/s
s

1,226,600

3,266,500

n/a

205 
12.5

8.5

8

kph
( kph)

°/s
s

1,257,267

3,348,167

n/a

210 
13.0

8.5

8

kph
( kph)

°/s
s

1,287,933

3,429,833

n/a

215 
13.5

9.0

8

kph
( kph)

°/s
s

1,318,600

3,511,500

n/a

220 
14.0

9.0

8

kph
( kph)

°/s
s

1,349,267

3,593,167

n/a

225 
15.0

10.0

9

kph
( kph)

°/s
s

1,379,967

3,674,917

n/a

230 
15.5

10.5

9

kph
( kph)

°/s
s

1,410,633

3,756,583

n/a

235 
16.0

10.5

9

kph
( kph)

°/s
s

1,441,300

3,838,250

n/a

240 
16.5

11.0

9

kph
( kph)

°/s
s

1,471,967

3,919,917

n/a

245 
17.0

11.0

9

kph
( kph)

°/s
s

1,502,633

4,001,583

n/a

250 
18.5

12.5

10

kph
( kph)

°/s
s

1,533,333

4,083,333

n/a

255 
19.0

12.5

10

kph
( kph)

°/s
s

1,564,000

4,165,000

n/a

260 
19.5

13.0

10

kph
( kph)

°/s
s

1,594,667

4,246,667

n/a

265 
20.0

13.0

10

kph
( kph)

°/s
s

1,625,333

4,328,333

n/a

270 
20.5

13.5

10

kph
( kph)

°/s
s

1,656,000

4,410,000

n/a

275 
21.5

14.0

10 +1 slot

kph
( kph)

°/s
s

1,686,667

4,491,667

n/a

280 
22.0

14.0

10 +1 slot

kph
( kph)

°/s
s

1,717,333

4,573,333

n/a

285 
22.5

14.5

10 +1 slot

kph
( kph)

°/s
s

1,748,000

4,655,000

n/a

290 
23.5

15.0

10 +1 slot

kph
( kph)

°/s
s

1,778,667

4,736,667

n/a

295 
24.0

15.0

10 +1 slot

kph
( kph)

°/s
s

1,809,333

4,818,333

n/a

300 
25.0

15.5

10 +2 slots

kph
( kph)

°/s
s

1,840,000

4,900,000

n/a

305 
26.5

17.0

10 +2 slots

kph
( kph)

°/s
s

1,870,667

4,981,667

n/a

310 
27.5

17.5

10 +2 slots

kph
( kph)

°/s
s

1,901,333

5,063,333

n/a

315 
28.5

18.0

10 +2 slots

kph
( kph)

°/s
s

1,932,000

5,145,000

n/a

320 
29.5

18.5

10 +2 slots

kph
( kph)

°/s
s

1,962,667

5,226,667

n/a

325 
30.5

19.0

10 +3 slots

kph
( kph)

°/s
s

1,993,333

5,308,333

n/a

330 
31.5

19.5

10 +3 slots

kph
( kph)

°/s
s

2,024,000

5,390,000

n/a

335 
32.5

20.0

10 +3 slots

kph
( kph)

°/s
s

2,054,667

5,471,667

n/a

340 
34.0

20.5

10 +3 slots

kph
( kph)

°/s
s

2,085,333

5,553,333

n/a

345 
35.5

21.5

10 +3 slots

kph
( kph)

°/s
s

2,116,000

5,635,000

n/a

350 
36.5

22.0

10 +4 slots

kph
( kph)

°/s
s

2,146,667

5,716,667

n/a

355 
38.5

23.0

10 +4 slots

kph
( kph)

°/s
s

2,177,333

5,798,333

n/a

360 
40.0

23.5

10 +4 slots

kph
( kph)

°/s
s

2,208,000

5,880,000

n/a

365 
41.5

24.5

10 +4 slots

kph
( kph)

°/s
s

2,238,667

5,961,667

n/a

370 
43.5

25.5

10 +4 slots

kph
( kph)

°/s
s

2,269,333

6,043,333

n/a

375 
45.5

26.5

10 +5 slots

kph
( kph)

°/s
s

2,300,000

6,125,000

n/a

380 
48.0

27.5

10 +5 slots

kph
( kph)

°/s
s

2,330,667

6,206,667

n/a

385 
50.5

29.0

10 +5 slots

kph
( kph)

°/s
s

2,361,333

6,288,333

n/a

390 
53.0

30.0

10 +5 slots

kph
( kph)

°/s
s

2,392,000

6,370,000

n/a

395 
56.0

31.5

10 +5 slots

kph
( kph)

°/s
s

2,422,666

6,451,667

n/a

400 
59.5

33.5

10 +6 slots

kph
( kph)

°/s
s

2,453,333

6,533,333

n/a
