A $\text{σ}-$ bond is stronger than a $\text{π}-$ bond.
Sigma $\left(\text{σ}\right)$ bonds are formed by head-on overlap of unhybridised $\text{s}-\text{s},\text{p}-\text{p}\text{o}\text{r}\text{s}-\text{p}$ orbitals and hybridized orbitals $\left(\text{s}\text{p},\text{s}{\text{p}}^2,\text{s}{\text{p}}^3,\text{s}{\text{p}}^3\text{d}\text{a}\text{n}\text{d}\text{s}{\text{p}}^3{\text{d}}^2\right)$ . Hence, $\text{σ}$ bond are strong bonds. Where as Pi $\left(\text{π}\right)-$ bonds are formed by side-wise overlap of unhybridised p and d orbitals. Hence $\text{π}$ bonds are weak bonds.