diff -r a4d6b2fe51e3 -r d5b0caeac2d7 src/train_cmd.cpp
--- a/src/train_cmd.cpp	Tue May 13 20:26:48 2008 +0000
+++ b/src/train_cmd.cpp	Tue May 13 20:39:57 2008 +0000
@@ -118,6 +118,9 @@
 		if (engine_has_power) {
 			uint16 power = GetVehicleProperty(u, 0x0B, rvi_u->power);
 			if (power != 0) {
+				/* Halve power for multiheaded parts */
+				if (IsMultiheaded(u)) power /= 2;
+
 				total_power += power;
 				/* Tractive effort in (tonnes * 1000 * 10 =) N */
 				max_te += (u->u.rail.cached_veh_weight * 10000 * GetVehicleProperty(u, 0x1F, rvi_u->tractive_effort)) / 256;
@@ -3499,6 +3502,9 @@
 		byte cost_factor = GetVehicleProperty(v, 0x0D, rvi->running_cost);
 		if (cost_factor == 0) continue;
 
+		/* Halve running cost for multiheaded parts */
+		if (IsMultiheaded(v)) cost_factor /= 2;
+
 		cost += cost_factor * GetPriceByIndex(rvi->running_cost_class);
 	} while ((v = GetNextVehicle(v)) != NULL);