Multi-piece solid golf ball

A multi-piece solid golf ball comprising a core, an envelope layer, an intermediate layer and a cover, wherein the core is formed of one or more layer of a rubber composition;

• the envelope layer, intermediate layer and cover are each formed of a single layer of resin material;
• the hardness relationship among the layers, in terms of Shore C hardness values, satisfies the following two conditions:
• material hardness of cover>material hardness of intermediate layer, and
• material hardness of envelope layer≥surface hardness of core;
• the ball additionally satisfies the condition:
• thickness (mm) of envelope layer×material hardness (Shore D hardness) of envelope layer≥thickness (mm) of cover×material hardness (Shore D hardness) of cover;
• and, letting C be the deflection of the core in millimeters when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) and B be the deflection of the ball in millimeters when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf), C-B has a value of 1.00 mm or more, and
• the ball satisfies the condition:
• 0.80≤(E·vh+I·vh)/Core·vh≤2.00,
• wherein Core vh is the value expressed as [core volume (mm3)×(Shore C hardness at core surface+Shore C hardness at core center)/2], E·vh is the value expressed as [volume (mm3) of envelope layer material portion×Shore C hardness of envelope layer material] and I·vh is the value expressed as [volume (mm3) of intermediate layer material portion×Shore C hardness of intermediate layer material].